good video. direct to the point. Most people don't realize low compression will not allow a 2 stroke to fire. Wish I had seen this before I had to figure that out for myself, would have saved a lot of time.
I need help.. what about a four-stroke? I have a dirt bike engine that was just badly stored and it didnt run for a few years and now it wont start. I put some oil in the head for a day to make sure rings weren't sticked or seized up , has a good blue spark I also did a oil change and it got decent compression but when I put gas in the spark plug hole it backfires but won't start? thanks
@@justinc9911 thank you for the comment I appreciate it. What kind of oil did you put in the spark plug hole and how much? What was the compression reading?
Tiny engines like this will not give an accurate compression reading using the same tester that you would use on larger engines. The problem is it's only compressing a very small volume of air which some of it gets lost in the hose running from the dial to the threads where you screw it into the spark plug hole. If you use a compression tester with no hose on it or modify yours to use as short of length hose as possible this will give you more of an accurate reading.Your problem may not be compression. I have a small outboard motor that only reads 60 lbs of compression on my tester that is meant to be used on larger engines and it runs like a bat out of hell. There is one other thing necessary for an engine to run besides compression Fuel and Spark and that would be timing
Yes, if it is out of time it will never run. Just fixed a Craftsman lawnmower. Had spark and fuel but wouldn't run. I pulled the flywheel and found the key was no longer square but was shaped like a Z. Of course the blade was bent, but I was lucky the crankshaft was not bent. I reinstalled the flywheel with a new key and it still didn't start. I removed the flywheel and took a second look and found a slight offset in the internal keyway. It only takes a wisker i.e. small amount of offset and it will through it out of time. I replaced the flywheel with a used one I had around the shop and presto she now runs like a champ. I had to reset the coil gap, as the replacement flywheel was slightly larger, prior to test run. Another thing to remember is that the flywheel key only has to be moved out of alignment a very slight amount to kick it out of time. It could be a very slight mark or line on the key that can kick it out of time. New keys are cheap so if in doubt replace it. Under severe circumstances on lawnmowers the actual flywheel could be cracked from the initial impact on the lawnmower blade. No substitute for a good inspection of the parts prior to reassembly. Usually, small 2 cycle stuff will not have this issue unless the flywheel nut came loose or other mechanical failure. John
just picked up a used Weedeater SV2000BV new plug , has spark , i rebuilt the carb , no Compression !!!!!!!! took the engine apart ring seized to piston . put new ring Voila !!!!!!!!!!! has Compression now
Well this doesn't really help with my situation. I have spark n fuel. The weed eater has sat for prolly 7 or more years. It's always had premix. I decided to try n get it going in early March n had it running on half choke but couldn't do a proper adjustment to the carb. I used true fuel premix for that. Then noticed the carb n lines were leaking. I just put a new carb on it cuz it was cheaper than a rebuild n now it won't even light off with a bit of ether
@@HomeGaragechannel I have one. Didn't run a compression test on it. But it feels like it has good compression n it wasn't run much before it sat for 2 years n developed carb issues which is why it's sat so long after. N thanks for your reply I appreciate it
@@HomeGaragechannel I just ran a compression check on it n my gauge must not be sealing cuz it's barely moving the needle but yet it'll blow my thumb off
Its been almost 1 year since this video was posted and one item to check that you didn't talk about and I didn't see in the comments: did you check the muffler spark arrestor screen to make sure it wasn't plugged up? If you can't get exhaust out you can't get new air fuel charge in thus not allowing the engine to create compression. I've seen this scenario many times. The fix is to take the screen out and use a hand held torch to heat the screen up to cherry red while holding with a pair of needle nose vise grips and then use a wire brush to clean it off then reinstall it and if everything else is good it will run.
Thank you Craig Timmons. It wasn't filmed but later inspection showed that it was ran with straight gas which tore up the ring and cylinder. No saving this one without a new top end kit. I have another video with a clogged spark arrestor. It's the echo weedeater that won't go to full speed.
Don't remember if I commented on this one or not but I would love to see you rebuild it or replace the piston and cylinder or what ever it needs to get it up and running again
@@HomeGaragechannel Holy shit, you still have it? I _was_ going to comment it being ashame you didn't take the engine apart on camera before tossing it, but apparently THATS still on the table.
I think it's better to check spark off of the plug itself rather than an inline spark checker. You can tell if the plug itself has a strong blue spark.
On 2-cycle engines, if low compression, then pull the muffler and look at scoring on the cylinder and piston. While you found this to be the culprit, another reason for low compression and a no start condition is a massive air leak.
The low compression situation just happened today on my trimmer. I took the spark plug out and poured in about a teaspoon of oil into the crankcase, put back the spark plug, and it started! I believe the piston was worn but the oil could still be able to help.. .
I had the same problem, bought carb. Kit with everything and a brand new fuel cap and new spark plug....but my problem was compresion from the piston from 90 to 95 psi, so I just put some transmition oil inside the spark plug an crack it for a couple of days (3) an wala I had presion again, the piston ring was stuck an everything back to normal...I hope this works for you guys...Good luck.
@@henrikjonsson4340 It would be the most extensive rebuild I've ever done. Cylinder, piston and rings would need to be replace. it would make a decent video but I would have to bear the entire cost on a high end machine.
@@HomeGaragechannel Yes it would but it would also be a great study for people who are in a startup of learning a mechanic experience BUT only if you have time and money for it :) Sometimes I rebuilt something that took very long time but in the end I learned something that speed up my next project.
just so you know even with bad compression the motor would still run just saying also when you spray in the carb like that make sure the piston is down it prolly was up blocking the cylinder and you didn't spray anything in there at all
Well I just wasted a day on 3 of these engines, wish I would get a compression tester already. Definitely would save loads of frustration. I had been piecing my hedge clippers and whackers together for years, like 10, and they all completely died this week. Guess its time for some new shit.
or maybe you gummed them up with bad gas??? since all problem started same time, maybe the fuel batch wasnt real good... try starting it shortly with a bit of methanol(fondue fuel) and a dip of oil straight in the carb, you'll know immediatly if it start for a couple sec ^^
That's a pretty good idea, but do it shortly or you will soon get sleeve dammage. otherwise, it's the best trick to test 2 stroke engine still, but try Nitro RC Fuel, it works better and clean pretty good!
How the heck do you fix the issue though? I have 6 echo srm225s and 3 of them have that problem. Has spark, has propper fuel. Exhaust is clean... what gives? Nice video but you didn't explain what causes low compression or how to fix the issue. Not trying being rude I'm just curious if you know how to fix it
Hello there I have fs 38 stihl weed eater that won’t start. Has great compression, good spark, and a good running carburetor. Even if I spray carb cleaner in the cylinder, all I hear is pops from exhaust. Any idea what it would be? Thanks
sure, I need you to get or borrow a compression tester, and get a reading. Sometimes, when it only pops, the compression is much lower than you think. After that it might be a timing issue but only if you've put a blade on it, could that happen
I see, bit low, but It should run. How many times have you tried to start it? Every time you try and start it, and it doesn't, it could just flood the engine. Try taking out the plug, and letting it sit for a day or two, then when you try to start it, "don't" choke it, and see what it does.
I had a harbor frieght compression tester. I tested a weed eater brand trimmer. It registered 40 but it runs. The rope is easy to pull & i have to not take too big a bite into tall weeds. I took the tester back to harbor frieght, got another one. It said 40 too. Its one of my best running weed eaters, just not very strong, allthough i do have 4 strings in the head. If its actually 40, from what ive learned it shouldnt run
that's what I figured too. But do me a favor, if you get a chance take off the muffler and take a look at the side of the piston and the ring and see if there's scoring on it.
@@dylanoconnor6441 it was 2 years ago and i was probably looking to fix my broke ass weed wacker. not everyone has to post when they go to the bathroom
@@wesss9353 I don’t know why you are swearing I was trying to express that not every video is going to fit your needs, if this video didn’t help you, quite frankly you don’t need to tell others it didn’t help, this comment you made isn’t helping anyone either. And a personal attack at a random person on TH-cam isn’t a great way to tell people your frustrated for being called out.
Concise video. No fluff... nice! I have a Cub Cadet and put in fresh fuel mix. Won't start, so I pluck n clean the carb ( I didn't see any h2o signs or crud clogs). I tested for spark - pulling the plug and grounding it to the metal frame and she sparks on every pull. It still won't start .... and I'm wondering if there is another method to check compression? I don't have a gauge thing-a-ma-doo-hicky. I doubled checked that the switch is "on" and that the primer bulb is full of fuel and moves through the lines just fine. I'm about to throw this sucker off the garage roof like a javelin thrown by a Viking.
Lol nice.. well this is a tough question. Did you see if the black metering diaphram was stiff or warped when you cleaned the carb? As far as the compression tester goes the only other was is to slowly pull on the rope probably at a rate of 1 foot a second and see how much the engine pulls back on each stroke. Do you have a working 2 cycle equipment to compare to? That would be the only other way I can safely gauge engine compression.
Shindaiwa machines, tuffs strong's, best commercial units, this will go on next to no compression, Had one like this that, I used it in my lawnmower business for 7 yrs 155 lawns a fortnight, & the guy before be had it for some time as well, in that time when through dozen plugs & 3 pull strings. Was getting hard to start, it was starting a little hard to start, just in the mornings, took in for the repair guy to look at, what he said it had no compression, hardy a reading:) so used it for another week:) while he order me a new one. shindaiwa, motto, first to start last to quit, is so true, & they run more smoothly, than others when you hear others around running, like ratty stihi, you look around small engine repair shops next time?? see any shindaiwas or echos?? if any its 25 to 1 Like you say will be the fault of the operator & not the machine!! why you say? its easy, its japanese,
Mike, I'm not a Stihl fanboy (prefer Echo dollar for dollar). Do u think there may be mor Stihl machines in the shop because Stihl outsells just about everthing else by a wide margin?
It takes three things for an engine like this to run. Fuel, air and spark. The correct fuel to oil mixture helps a lot too. Being that this engine is probably a high compression one, usually around 11-1, mid grade fuel would work a lot better. And its usually only a dime more and that will not break the wallet.
I used to think the same thing but got a few lessons over the years. Ignition system needs to be in time and also the engine requires a certain amount of compression to run. If you meet the fuel, air and spark requirements and the engine system is out of time or is low on compression it will never run. John
compression is a bit to low making it tough to start. Do me a favor, next time take out the spark plug and drop about 5 to 6 drops of 2 stroke oil into the engine, replace plug and see if it will try and start.
how much compression is good or normal 120 psi? or less or more? whats the lowest psi around 80 ? are all weed wackers in same psi range regardless of make or models? thanks
I would consider anything over 80 psi pretty good. I have only ever seen one weedeater get over 100 psi. No not all weedeaters have the same range. Its hard to get a psi number because the engines are so small in comparison to a car.
@@HomeGaragechannel thank you very much. I'm in Fiji and use an made in Australia brushcutter. Kawasaki and Stihl one available too but VERY expensive. I buy premix 50:1 and put 90 mml 2 stroke oil on 1 gallon container. Greetings and best wishes.🇫🇯🌴 Hans B.
Hi,my brush cutter run for 2,3 minute and stop,when i try to start it won't start,i clean the carburator and spark plug is fine,think it the compression. What part do i need to change if no compression?
Thank you Nellie bariamtaak for the comment I appreciate it. If the compression is low then you to buy a new piston, piston ring, and cylinder. The only problem is installing them is very involved and it's not fun.
Something else to look at: my blower does this because of vapor lock. The gas cap is clogged and not allowing air in the tank; ergo, not allowing gas to travel out.
So what is your recommendation for a leaf blower that has plenty of fuel in cylinder, plenty of spark, and generates 90PSI, but it still won't start? I have all of the ingredients for a small engine to run, but It doesn't even try to start. I'm stumped.
Let me also add that I removed and cleaned out the entire muffler, and I torched and blew off the spark arrestor, too. I have been very thorough with this thing, and it won't cooperate. Let me know what you think.
@@seanwetrich8299 thank you for the comment and all the information. This is tricky but here's a thought. We have compression, fuel, and spark but the one thing we cant see is does the spark actually occur when it's supposed to and is it enough when under pressure. The timing might be off slightly due to a sheared flywheel key or the spark might be weak and "blown out" inside the cylinder due to a ignition coil problem. Also please confirm that the engine isn't flooded due to repeated start up attempts. Thanks and please let me know as I'm curious too.
@@HomeGaragechannel Thank you for the timely response. I haven't checked the flywheel. That is where I am leaning. I try to eliminate all other possibilities before going to that, especially on blowers. This blower belongs to a customer whose brother just brought me in a similar blower that sheared a key. I don't know what would cause a blower to shear a key other than maybe a rock going through the impeller. However, you would think the plastic fins of the impeller would break before the key sheared. I am going to try firing this up with the muffler off and see if that fixes anything. Other than that, I'd say it has to be timing or weak ignition. Thanks again.
I have a shindaiwa eb 45 backpack blower they said there was a recall because of fuel tank but I heard they are good blower what do you think I should do thanks
sure thing, Have you confirmed the on/off switch is in the correct position. Are you following the printed starting procedure. And if you are, remember that after every failed attempt to start a 2 stroke trimmer, will flood the engine with fuel. You'll then have to either start an "un-flooding" procedure or let it sit for awhile before starting again
Should have put a carby kit in first. Those Shindaiwa are great but no trimmer will give a high compression reading, 27cc would fill the hose and that'd be it. Very poor effort.
yes ign timing can be thrown out of time easily causing the 2 stroke to fail to start like mine i believe .have to check flywheel to see if moved of keyway .weed whacker not very old but something must have caused the flywheel to move off the keyed shaft.i believe ign is set by flywheel and keyed shaft in fixed position.will see when i take off flywheel.
I use the same tester that I use for my car yes it has a long hose you just have to run it up and pump the air I'm astounded that I got 120 lb I have a tiny bit of blue Spark and it will not attempt to fire even on nasty ether I know it's the wrong thing to use but it was either going to kick my ass or I was going to kick its ass
I am guessing that if you have a weak spark outside of the engine that once inside the engine that spark plug has a tough time sparking under pressure. Would you consider buying a new spark plug and trying it? Its only a couple of dollars at walmart. Might be worth a shot.
Hie home garage, I just found out that my weed eater had a minor seizure. the ring were stuck to the piston and the piston is scratched a little but the cylinder appears better than the piston. I manage to unseize the rings and reassembled it a damaged head gasket just to try the compression. I put a little fuel in the plug hole and started it. Ran on that fuel. When I installed a carb it didn't even caugh. So I'm thnkng of replacing the piston and head gasket. I was wondering if I really "need" to replace the cylinder as well. Plz help, thanks.
I hate to say but I've try to just replace the ring as well and the success rate is rather low. Its suggested to replace the cylinder along with the ring unless you can somehow hone the cylinder wall to receive a new ring. Thank you for commenting.
Nick B thank very much for the comment. I would like the number to be over 80 if not 95. I have seen some in the 60's that ran okay but were definitely beginning to see retirement.
its not worth rebuilding because its of the cost and effort. for $100 dollars you can buy the parts for this one or get a brand new trimmer. most people wouldn't go thru the hassle. I don't even want to do it.
I got a stihl fs75 with spark, fuel, and 100 psi of compression...put a new carb on and still won't start. Idk if it's electrical. Can't even get it to fire.
Home Garage tried a brand new spark plug and it get wet with fuel so it's getting fuel. Has great spark. The electrical connections seem fine. Took off the muffler thinking it might be clogged. Hooked up a drill to the starter and got it to puff a little bit of black smoke. About to give it away lol.
@@keshmo12 check the 'spark arrestor' wire rectangle outboard of the muffler (to keep sparks from flying). Sometimes they are covered in carbon and preventing an engine from running. Propane torch will burn off all the carbon... hold it in a vice-grip or bench vise.... gets red hot!
This is from using the cheap gas with the ethanol in it,it seizes the ring in the piston. Use the good BP higher octane and you will have no problems,will even start easier than before.Good luck...
I am very much believe the engineers and the. Manufacturer they never hasn’t been using the spark plug tester,it have very stupid design,the spark plug tester nose ,way too long,, ,made it very difficult to use on most lawnmower N weed eater .the tester nose should not longer than the spark plug body length.
Compression 90, and decreasing but I suppose thats because it's only handtight. New HT cap, three new tubes into fuel tank. Accessed carb, squirted in some carbfizz (forgot to ensure piston was down! ) Still nothing. Connected so-called spark plug tester but the shaking caused by tugging meant I couldnt see if it was lighting up. So what else can if I until others dark? Well, I removed the kill wire from the coil, one gentle pull and fired up! Tried hitting the off/kill switch but of course nothing happened. Closed choke, engine shut off. Great, but what does this mean? A short somewhere, but where? Reluctant to dismantle switch area because the fiddly springs ' placement is not obvious. Anyone? Thanks!
@@johncollins8304 take it into a shady area to test like a shed or in the garage. you should be able to see the spark. Yes the kill switch is still grounded somehow. if you don't want to take apart the switch Or replace it, do what you already tried, remove the ground wire from the coil and just choke it to stop the engine.
@@HomeGaragechannel It's very good of you to reply. Well I did take apart the switch assembly, very gingerly, using tape to hold the triggers and springs in place. Did ohms test on the switch -- seems okay. Dony Boy says it might be the air gap on the coil being wrong. So I'll try that tomorrow! Thanks again.
You said Ned's a mixture so I quest it's 2 stroke, sparkplug is dirty change new one if needed. Check carborator fuel line and fuel filter, both 2 stroke eat a lot of fuel waste fuel nature, weak engine power less space work to loud. Is it worth to fix youse, or Honda 4strokes stronger engine power .fuel efficiency, can work more space. Down side of 4stroke more expensive oil gas expenses, while 2stroke cheaper oil gas maintenance weak engine not efficient on work. And it s very loud to ear.
good video. direct to the point. Most people don't realize low compression will not allow a 2 stroke to fire. Wish I had seen this before I had to figure that out for myself, would have saved a lot of time.
You and me both. I've wasted plenty of time before I realized it. Thanks for the comment I appreciate it
I need help.. what about a four-stroke? I have a dirt bike engine that was just badly stored and it didnt run for a few years and now it wont start. I put some oil in the head for a day to make sure rings weren't sticked or seized up , has a good blue spark I also did a oil change and it got decent compression but when I put gas in the spark plug hole it backfires but won't start?
thanks
@@justinc9911 thank you for the comment I appreciate it. What kind of oil did you put in the spark plug hole and how much? What was the compression reading?
@@HomeGaragechannelit's a 125cc there around 120psi and I put wd40
@@justinc9911thanks for the information. Can you do a leak down test on it?
Tiny engines like this will not give an accurate compression reading using the same tester that you would use on larger engines. The problem is it's only compressing a very small volume of air which some of it gets lost in the hose running from the dial to the threads where you screw it into the spark plug hole. If you use a compression tester with no hose on it or modify yours to use as short of length hose as possible this will give you more of an accurate reading.Your problem may not be compression. I have a small outboard motor that only reads 60 lbs of compression on my tester that is meant to be used on larger engines and it runs like a bat out of hell. There is one other thing necessary for an engine to run besides compression Fuel and Spark and that would be timing
Thank you for all your insight and information I really appreciate people who know what's Going on who watch my videos.
Yes, if it is out of time it will never run. Just fixed a Craftsman lawnmower. Had spark and fuel but wouldn't run. I pulled the flywheel and found the key was no longer square but was shaped like a Z. Of course the blade was bent, but I was lucky the crankshaft was not bent. I reinstalled the flywheel with a new key and it still didn't start. I removed the flywheel and took a second look and found a slight offset in the internal keyway. It only takes a wisker i.e. small amount of offset and it will through it out of time. I replaced the flywheel with a used one I had around the shop and presto she now runs like a champ. I had to reset the coil gap, as the replacement flywheel was slightly larger, prior to test run. Another thing to remember is that the flywheel key only has to be moved out of alignment a very slight amount to kick it out of time. It could be a very slight mark or line on the key that can kick it out of time. New keys are cheap so if in doubt replace it. Under severe circumstances on lawnmowers the actual flywheel could be cracked from the initial impact on the lawnmower blade. No substitute for a good inspection of the parts prior to reassembly. Usually, small 2 cycle stuff will not have this issue unless the flywheel nut came loose or other mechanical failure.
John
so how does one check timing?
Or a clean air filter. Lol
just picked up a used Weedeater SV2000BV new plug , has spark , i rebuilt the carb , no Compression !!!!!!!!
took the engine apart
ring seized to piston .
put new ring Voila !!!!!!!!!!!
has Compression now
Joni English wow great work! Glad it worked for you. I might have to try it too.
Alright!
No compression vs low compression. No compression probably an easier fix.
Well this doesn't really help with my situation. I have spark n fuel. The weed eater has sat for prolly 7 or more years. It's always had premix. I decided to try n get it going in early March n had it running on half choke but couldn't do a proper adjustment to the carb. I used true fuel premix for that. Then noticed the carb n lines were leaking. I just put a new carb on it cuz it was cheaper than a rebuild n now it won't even light off with a bit of ether
could you get a hold of a compression tester and find out what kind of compression you're getting
@@HomeGaragechannel I have one. Didn't run a compression test on it. But it feels like it has good compression n it wasn't run much before it sat for 2 years n developed carb issues which is why it's sat so long after. N thanks for your reply I appreciate it
@@benmiller5015 no problem. I've had echo trimmers that sorta ran and after doing a compression test it showed it to be very low
@@HomeGaragechannel I just ran a compression check on it n my gauge must not be sealing cuz it's barely moving the needle but yet it'll blow my thumb off
@@benmiller5015 interesting
Its been almost 1 year since this video was posted and one item to check that you didn't talk about and I didn't see in the comments: did you check the muffler spark arrestor screen to make sure it wasn't plugged up? If you can't get exhaust out you can't get new air fuel charge in thus not allowing the engine to create compression. I've seen this scenario many times. The fix is to take the screen out and use a hand held torch to heat the screen up to cherry red while holding with a pair of needle nose vise grips and then use a wire brush to clean it off then reinstall it and if everything else is good it will run.
Thank you Craig Timmons. It wasn't filmed but later inspection showed that it was ran with straight gas which tore up the ring and cylinder. No saving this one without a new top end kit. I have another video with a clogged spark arrestor. It's the echo weedeater that won't go to full speed.
Thanks for posting that. Only got 50psi on mine and will check the muffler before stripping the engine to check the rings.
Thank you ColinWatterd and you're welcome. Good luck with the engine.
Thanks for the comment. Sorry about the theft. That is quite the experience. I've never had that happen to me before.
Craig Timmon
Don't remember if I commented on this one or not but I would love to see you rebuild it or replace the piston and cylinder or what ever it needs to get it up and running again
yes but the cost would higher than the value, If I can find the parts cheap, I'll definitely do it.
It would be ashamed to throw that nice trimmer away
oh I've still got it, and in storage along with the others waiting to be looked at.
@@HomeGaragechannel Holy shit, you still have it?
I _was_ going to comment it being ashame you didn't take the engine apart on camera before tossing it, but apparently THATS still on the table.
I think it's better to check spark off of the plug itself rather than an inline spark checker. You can tell if the plug itself has a strong blue spark.
Good point. Thanks for the comment I appreciate it
The basic faultfinding was done and diagnoses identified and reason to continue with low compresson on brush cutter. Good video☺
Thank you for the comment I appreciate it
That's all good,
My shindiawa 230 has a compression of 30psi and never wanted to start, but I changed the throttle body and it started.
For a 2 stroke that's amazing
before buying... check the compression by feel or with a metering device. THEN buy or not.
You are absolutely correct.
On 2-cycle engines, if low compression, then pull the muffler and look at scoring on the cylinder and piston. While you found this to be the culprit, another reason for low compression and a no start condition is a massive air leak.
yes you're absolutely right.
Massive air leak where?
At the exhaust?
The low compression situation just happened today on my trimmer. I took the spark plug out and poured in about a teaspoon of oil into the crankcase, put back the spark plug, and it started! I believe the piston was worn but the oil could still be able to help.. .
Short and to the point. Love it.
Thank you for the comment I appreciate it
I had the same problem, bought carb. Kit with everything and a brand new fuel cap and new spark plug....but my problem was compresion from the piston from 90 to 95 psi, so I just put some transmition oil inside the spark plug an crack it for a couple of days (3) an wala I had presion again, the piston ring was stuck an everything back to normal...I hope this works for you guys...Good luck.
Thank you for the comment.
Thanks! But it is garbage ? Cant you get another piston-ring or is the cylinder walls that is bad?
Oh it's really bad. The previous owner tore it apart when they ran straight gas thru it till it died.
@@HomeGaragechannel Oh really that bad :)
@@henrikjonsson4340 It would be the most extensive rebuild I've ever done. Cylinder, piston and rings would need to be replace. it would make a decent video but I would have to bear the entire cost on a high end machine.
@@HomeGaragechannel Yes it would but it would also be a great study for people who are in a startup of learning a mechanic experience BUT only if you have time and money for it :) Sometimes I rebuilt something that took very long time but in the end I learned something that speed up my next project.
@@henrikjonsson4340 that makes it quite educational then. Thank you for your time.
just so you know even with bad compression the motor would still run just saying also when you spray in the carb like that make sure the piston is down it prolly was up blocking the cylinder and you didn't spray anything in there at all
Thanks for the comment
I recommend the Echo Red Armor pre mix gas
That would have definitely kept this from happening. Thanks for the comment I appreciate it
Well I just wasted a day on 3 of these engines, wish I would get a compression tester already. Definitely would save loads of frustration. I had been piecing my hedge clippers and whackers together for years, like 10, and they all completely died this week. Guess its time for some new shit.
Thank you Pilesofplenty. Yes its time for new equipment. Let the frustration go.
or maybe you gummed them up with bad gas??? since all problem started same time, maybe the fuel batch wasnt real good... try starting it shortly with a bit of methanol(fondue fuel) and a dip of oil straight in the carb, you'll know immediatly if it start for a couple sec ^^
That's a pretty good idea, but do it shortly or you will soon get sleeve dammage. otherwise, it's the best trick to test 2 stroke engine still, but try Nitro RC Fuel, it works better and clean pretty good!
Thank you Daphnee LeBlanc. I'll do a video soon on it but I'm pretty sure the piston and cylinder are torn up.
Thank you HereGoesNutting. It couldn't possibly damage it anymore than it already is.
How the heck do you fix the issue though? I have 6 echo srm225s and 3 of them have that problem. Has spark, has propper fuel. Exhaust is clean... what gives? Nice video but you didn't explain what causes low compression or how to fix the issue. Not trying being rude I'm just curious if you know how to fix it
Thanks. You have to rebuild the top end which was not an option at the time. This engine was ran on straight gas and that's how it was damaged
@@HomeGaragechannel whats the top end?
@@Sulaimaanhr the piston and cylinder
@@HomeGaragechannel oh ok
@Wayne96819 yes thats is a great option. It would have kept this trimmer alive for sure
Hello there I have fs 38 stihl weed eater that won’t start. Has great compression, good spark, and a good running carburetor. Even if I spray carb cleaner in the cylinder, all I hear is pops from exhaust. Any idea what it would be? Thanks
sure, I need you to get or borrow a compression tester, and get a reading. Sometimes, when it only pops, the compression is much lower than you think. After that it might be a timing issue but only if you've put a blade on it, could that happen
@@HomeGaragechannel compression shows a bit over 80psi
I see, bit low, but It should run. How many times have you tried to start it? Every time you try and start it, and it doesn't, it could just flood the engine. Try taking out the plug, and letting it sit for a day or two, then when you try to start it, "don't" choke it, and see what it does.
@@HomeGaragechannelok. i will do that. Thank you so much for your time 👍
no problem
I had a harbor frieght compression tester. I tested a weed eater brand trimmer. It registered 40 but it runs. The rope is easy to pull & i have to not take too big a bite into tall weeds. I took the tester back to harbor frieght, got another one. It said 40 too. Its one of my best running weed eaters, just not very strong, allthough i do have 4 strings in the head. If its actually 40, from what ive learned it shouldnt run
that's what I figured too. But do me a favor, if you get a chance take off the muffler and take a look at the side of the piston and the ring and see if there's scoring on it.
Waste of 2 minutes
agreeed
Not every video is going to be perfect for everyone.
@@dylanoconnor6441 it was 2 years ago and i was probably looking to fix my broke ass weed wacker.
not everyone has to post when they go to the bathroom
@@wesss9353 I don’t know why you are swearing I was trying to express that not every video is going to fit your needs, if this video didn’t help you, quite frankly you don’t need to tell others it didn’t help, this comment you made isn’t helping anyone either. And a personal attack at a random person on TH-cam isn’t a great way to tell people your frustrated for being called out.
Concise video. No fluff... nice!
I have a Cub Cadet and put in fresh fuel mix. Won't start, so I pluck n clean the carb ( I didn't see any h2o signs or crud clogs). I tested for spark - pulling the plug and grounding it to the metal frame and she sparks on every pull. It still won't start .... and I'm wondering if there is another method to check compression? I don't have a gauge thing-a-ma-doo-hicky.
I doubled checked that the switch is "on" and that the primer bulb is full of fuel and moves through the lines just fine. I'm about to throw this sucker off the garage roof like a javelin thrown by a Viking.
Lol nice.. well this is a tough question. Did you see if the black metering diaphram was stiff or warped when you cleaned the carb? As far as the compression tester goes the only other was is to slowly pull on the rope probably at a rate of 1 foot a second and see how much the engine pulls back on each stroke. Do you have a working 2 cycle equipment to compare to? That would be the only other way I can safely gauge engine compression.
Shindaiwa machines, tuffs strong's, best commercial units, this will go on next to no compression, Had one like this that, I used it in my lawnmower business for 7 yrs 155 lawns a fortnight, & the guy before be had it for some time as well, in that time when through dozen plugs & 3 pull strings. Was getting hard to start, it was starting a little hard to start, just in the mornings, took in for the repair guy to look at, what he said it had no compression, hardy a reading:) so used it for another week:) while he order me a new one. shindaiwa, motto, first to start last to quit, is so true, & they run more smoothly, than others when you hear others around running, like ratty stihi, you look around small engine repair shops next time?? see any shindaiwas or echos?? if any its 25 to 1 Like you say will be the fault of the operator & not the machine!! why you say? its easy, its japanese,
Thanks for the comment. I really like these units. I only wish I had a working unit. I might rebuild this one some day.
Mike, I'm not a Stihl fanboy (prefer Echo dollar for dollar). Do u think there may be mor Stihl machines in the shop because Stihl outsells just about everthing else by a wide margin?
How to solve this bad mixture gas problem any videos about it?
yes there is. ,th-cam.com/video/pkrMYHtiHJw/w-d-xo.html
Thank you for the information and help
You are welcome. Thanks for the comment I appreciate it
It takes three things for an engine like this to run. Fuel, air and spark. The correct fuel to oil mixture helps a lot too. Being that this engine is probably a high compression one, usually around 11-1, mid grade fuel would work a lot better. And its usually only a dime more and that will not break the wallet.
You are absolutely correct. Thanks for the comment.
I used to think the same thing but got a few lessons over the years. Ignition system needs to be in time and also the engine requires a certain amount of compression to run. If you meet the fuel, air and spark requirements and the engine system is out of time or is low on compression it will never run.
John
@@helicopterjohnshow do you time one?
I have a weed eater. New plug, good spark, fuel, new carb, 75 psi compression, no start. Ideas?
compression is a bit to low making it tough to start. Do me a favor, next time take out the spark plug and drop about 5 to 6 drops of 2 stroke oil into the engine, replace plug and see if it will try and start.
how much compression is good or normal 120 psi? or less or more? whats the lowest psi around 80 ? are all weed wackers in same psi range regardless of make or models? thanks
I would consider anything over 80 psi pretty good. I have only ever seen one weedeater get over 100 psi. No not all weedeaters have the same range. Its hard to get a psi number because the engines are so small in comparison to a car.
@@HomeGaragechannel thax for the info...
@@roadstar499 no problem thanks for asking
Hmm, please allow us to know what is the right ratio fuell / oil for a brush cutter?
it depends on the specific brush cutter, most engines are 40:1, what is the model number?
@@HomeGaragechannel thank you very much. I'm in Fiji and use an made in Australia brushcutter. Kawasaki and Stihl one available too but VERY expensive. I buy premix 50:1 and put 90 mml 2 stroke oil on 1 gallon container. Greetings and best wishes.🇫🇯🌴 Hans B.
@@hansb.8 Thank you Hans B. from Fiji,
Do you know if putting 50-1 fuel in a 40-1 engine will cause any problems?
it could, but only have a long time of use.
Hi,my brush cutter run for 2,3 minute and stop,when i try to start it won't start,i clean the carburator and spark plug is fine,think it the compression. What part do i need to change if no compression?
Thank you Nellie bariamtaak for the comment I appreciate it. If the compression is low then you to buy a new piston, piston ring, and cylinder. The only problem is installing them is very involved and it's not fun.
@@HomeGaragechannel thanks for the suggestion,it helps a lot ,wish u best of luck 4 yr youtube channel 😀😃😃
Something else to look at: my blower does this because of vapor lock. The gas cap is clogged and not allowing air in the tank; ergo, not allowing gas to travel out.
So what is your recommendation for a leaf blower that has plenty of fuel in cylinder, plenty of spark, and generates 90PSI, but it still won't start? I have all of the ingredients for a small engine to run, but It doesn't even try to start. I'm stumped.
Let me also add that I removed and cleaned out the entire muffler, and I torched and blew off the spark arrestor, too. I have been very thorough with this thing, and it won't cooperate. Let me know what you think.
@@seanwetrich8299 thank you for the comment and all the information. This is tricky but here's a thought. We have compression, fuel, and spark but the one thing we cant see is does the spark actually occur when it's supposed to and is it enough when under pressure. The timing might be off slightly due to a sheared flywheel key or the spark might be weak and "blown out" inside the cylinder due to a ignition coil problem. Also please confirm that the engine isn't flooded due to repeated start up attempts. Thanks and please let me know as I'm curious too.
@@HomeGaragechannel Thank you for the timely response. I haven't checked the flywheel. That is where I am leaning. I try to eliminate all other possibilities before going to that, especially on blowers. This blower belongs to a customer whose brother just brought me in a similar blower that sheared a key. I don't know what would cause a blower to shear a key other than maybe a rock going through the impeller. However, you would think the plastic fins of the impeller would break before the key sheared.
I am going to try firing this up with the muffler off and see if that fixes anything. Other than that, I'd say it has to be timing or weak ignition. Thanks again.
@@seanwetrich8299hey, did you repair it ?))
Could the throttle body be a problem?
No unfortunately not. Later on I had removed the muffler only to see the extensive ring damage from someone using straight gas.
I don't have any of these fancy tools. still trying to figure out why mine isn't working all of a sudden.
good luck.
Is their a way to increase or fix the pressure?
sure replace the piston and jug.
Best weed eater ever mine just got stolen
Thank you Fishin' the Bluegrass for the comment. Sorry to hear that.
I have a shindaiwa eb 45 backpack blower they said there was a recall because of fuel tank but I heard they are good blower what do you think I should do thanks
take It in for the recall.
Brand New not starting,new plug still not starting what could be the problems
sure thing, Have you confirmed the on/off switch is in the correct position. Are you following the printed starting procedure. And if you are, remember that after every failed attempt to start a 2 stroke trimmer, will flood the engine with fuel. You'll then have to either start an "un-flooding" procedure or let it sit for awhile before starting again
So what you do throw it away?
no I still have it. Considering my options. If the parts are affordable I'd like to rebuild it.
Should have put a carby kit in first. Those Shindaiwa are great but no trimmer will give a high compression reading, 27cc would fill the hose and that'd be it. Very poor effort.
thank you Terry Church
yes ign timing can be thrown out of time easily causing the 2 stroke to fail to start like mine i believe .have to check flywheel to see if moved of keyway .weed whacker not very old but something must have caused the flywheel to move off the keyed shaft.i believe ign is set by flywheel and keyed shaft in fixed position.will see when i take off flywheel.
let me know what you find.
great video again! so i guess you cant fix something with bad compression?
Unfortunately I would have to replace the top end and piston/ring set. It's usually not worth it.
not really for the price i agree
It depends
Sometimes it’s not to hard to fix
how do you fix it when there’s little or no compression?
rebuild it with a new piston, rings and cylinder, it's expensive
What should the compression be?
Ideal over 70 but as long as its over 60 it should run. Thanks for the comment I appreciate it
Are you going to rebuild or trash it?
I want to rebuild it however it might be tough getting the parts. Thanks for the comment I appreciate it
I use the same tester that I use for my car yes it has a long hose you just have to run it up and pump the air I'm astounded that I got 120 lb I have a tiny bit of blue Spark and it will not attempt to fire even on nasty ether I know it's the wrong thing to use but it was either going to kick my ass or I was going to kick its ass
I am guessing that if you have a weak spark outside of the engine that once inside the engine that spark plug has a tough time sparking under pressure. Would you consider buying a new spark plug and trying it? Its only a couple of dollars at walmart. Might be worth a shot.
thanks
You're welcome and thank you for the comment I appreciate it
You said what compression it has but not what it needs
it would need at least 100 PSI for me to be comfortable
i remember back 40 plus years ago i paid $300 for a top on the line commercial trimmer... now you can get one for under $200 just as good or better..
What model and make was the $300 one?
@@HomeGaragechannel tanaka i think... my first one was stolen... second one lasted a few years...model number no idea,,, i was 20 now im 61...
@@roadstar499 nice trimmer. Thanks for the information.
Great video.
Thank you sir.
OK thanks a lot! Keep on helping.
you gonna have to tear into the engine so why put the cover back on the carb?
throw it aside for another day when you feel like working on it?
Yes it's still sitting in the garage complete and I haven't lost any of the pieces. Its easier this way.
Makes it where you can't loose pieces also keeps moisture from getting at the inside of the carb
Thank you for the comment I appreciate it
I have weedeater it has new carb gets fire 90 psi and spart arrestors ok still no start any ideas ty
can you tell me the model number for it? that way I can see what it looks like. thanks
I dumped a "makes-6-gallons" bottle of 2-cycle oil in 1 gallon of gasoline like a freaking idiot. No wonder it won't crank.
it happens but fixable
i have one that refuses to start even with new plug (has spark) and carb.
Thank you WV591 for the comment. Have you checked the compression?
I have a bolen weed eater. Got a new carburetor for it. Have fresh gas, spark plugs firing. Doesn't seem like it through the carburetor
It tries to start if I pour a little gas in the carburetor. Any suggestion
@@leemuse1306 i have exact same one bolen 160 and cant get nothing but spark and gas
THANKYOU!!!
What should the compression be around 90?
90 would be great but anything over 50 is fine.
Hie home garage, I just found out that my weed eater had a minor seizure. the ring were stuck to the piston and the piston is scratched a little but the cylinder appears better than the piston. I manage to unseize the rings and reassembled it a damaged head gasket just to try the compression. I put a little fuel in the plug hole and started it. Ran on that fuel. When I installed a carb it didn't even caugh. So I'm thnkng of replacing the piston and head gasket. I was wondering if I really "need" to replace the cylinder as well. Plz help, thanks.
I hate to say but I've try to just replace the ring as well and the success rate is rather low. Its suggested to replace the cylinder along with the ring unless you can somehow hone the cylinder wall to receive a new ring. Thank you for commenting.
So, we’re you able to fix it?
Any a rebuild will fix it and i haven't done it yet.
You did good 👍👍😊, again. I like this one too.l have the same weedeater.
I would like mine if it was running. Maybe one day
Please turn volume down on that music!! The rest of the gadgets are interesting.
will do!
Mine has zero compression and runs?
Tester. Works
bad compression tester
Very helpful!!! Thanx home garage. What's the optimum compression then? On the tester.
Nick B thank very much for the comment. I would like the number to be over 80 if not 95. I have seen some in the 60's that ran okay but were definitely beginning to see retirement.
Can you come over?
not anytime soon
Okay so there's no so would it be worth rebuilding? Tell us how you would do that.
its not worth rebuilding because its of the cost and effort. for $100 dollars you can buy the parts for this one or get a brand new trimmer. most people wouldn't go thru the hassle. I don't even want to do it.
Just so the Americans know it's called a Strimmer
Yes its. I hate to say it but the first time heard that was from Jeremy Clarkson
For spare parts
Yes at this point its for spare parts. Thanks for the comment I appreciate it
Yes at this point its for spare parts. Thanks for the comment I appreciate it
2 stroke engines has high carbon build up. Tear it down and give it a good clean up.
You are correct. Thanks for the comment I appreciate it
Thanks a lot.
Do you still have the weed eater ?
No it's gone. I guess you were intrested in getting it?
sounds like it needs a new set of piston rings inside
That an it will need a new head. Its pretty scratched up. Thank you for the comment. I appreciate it.
I got a stihl fs75 with spark, fuel, and 100 psi of compression...put a new carb on and still won't start. Idk if it's electrical. Can't even get it to fire.
Is the spark plug? Also after trying to start it did you check the plug to see if its wet with fuel?
Home Garage tried a brand new spark plug and it get wet with fuel so it's getting fuel. Has great spark. The electrical connections seem fine. Took off the muffler thinking it might be clogged. Hooked up a drill to the starter and got it to puff a little bit of black smoke. About to give it away lol.
Before you do that have you tried to start it as though it was flooded? Squeezed the throttle with no choke and pull about 10 times?
@@keshmo12 check the 'spark arrestor' wire rectangle outboard of the muffler (to keep sparks from flying). Sometimes they are covered in carbon and preventing an engine from running. Propane torch will burn off all the carbon... hold it in a vice-grip or bench vise.... gets red hot!
Carburetor if it’s not virgin anymore then it’s game over! Replace a new one no matter what don’t judge under paper not fixing your problems!
thank you, I appreciate it.
Mine has everything correct but still doesn’t start.
What kind of trimmer is it?
@@HomeGaragechannel craftsman
@@HomeGaragechannel I just checked, spark is good, timing is good, compression is good, and carb is good
@@HomeGaragechannel nothing works, even hooked a drill to the electric start and it wouldn’t start
It fired once for the whole week I have been working on it
What state are ya in?
Sorry I really don't like to say.
if its not the compression, look at piston and the rings
That sounds like another idea for a video. Thanks.
This is from using the cheap gas with the ethanol in it,it seizes the ring in the piston. Use the good BP higher octane and you will have no problems,will even start easier than before.Good luck...
Thanks for the information and Thanks for the comment as well.
That's good intel, but break it apart and rebuilt it I think us not practical unless us your own equip
I have considered rebuilding it only because of the brand name.
Why fuel not going into cylinder head
can you go into more detail? are you talking about yours, or the one in the video?
I am very much believe the engineers and the. Manufacturer they never hasn’t been using the spark plug tester,it have very stupid design,the spark plug tester nose ,way too long,, ,made it very difficult to use on most lawnmower N weed eater .the tester nose should not longer than the spark plug body length.
Thank you for the comment
Like a chip my whipper snipper is I like it
Thank you for the comment I appreciate it
Shit Quick start work everytime 100%
You sound so different in your newer videos
oh yes. I've changed quite a bit from this video.
@@HomeGaragechannel yeah
Cylinder head comes lose sometimes
Yes you are correct. Thanks for the comment I appreciate it
Compression 90, and decreasing but I suppose thats because it's only handtight. New HT cap, three new tubes into fuel tank. Accessed carb, squirted in some carbfizz (forgot to ensure piston was down! ) Still nothing. Connected so-called spark plug tester but the shaking caused by tugging meant I couldnt see if it was lighting up. So what else can if I until others dark?
Well, I removed the kill wire from the coil, one gentle pull and fired up! Tried hitting the off/kill switch but of course nothing happened. Closed choke, engine shut off. Great, but what does this mean? A short somewhere, but where? Reluctant to dismantle switch area because the fiddly springs ' placement is not obvious. Anyone? Thanks!
"So what else can if I until others dark? " should be, 'So what else can I do until it gets dark?'
@@johncollins8304 take it into a shady area to test like a shed or in the garage. you should be able to see the spark. Yes the kill switch is still grounded somehow. if you don't want to take apart the switch Or replace it, do what you already tried, remove the ground wire from the coil and just choke it to stop the engine.
@@HomeGaragechannel It's very good of you to reply. Well I did take apart the switch assembly, very gingerly, using tape to hold the triggers and springs in place. Did ohms test on the switch -- seems okay. Dony Boy says it might be the air gap on the coil being wrong. So I'll try that tomorrow!
Thanks again.
Change oil seal
my whipper snipper runs on 30psi lol
2bangerboi03 thank you for commenting. I'm surprised it runs with that low a compression number.
This engine was actually ran with straight gas which destroyed the ring. That's why the compression was low.
no way!
Is that a commercial weed eater
No but it's close. Thanks for the comment I appreciate it
Send me the carb I need it
i may still use it
needs new coil
Lil Araab thanks for the comment.
Its firing, why would it need new coils?
Her glasses don't fit....they keep sliding off her face.
thanks for the comment
Thanks for a waste of time
You said Ned's a mixture so I quest it's 2 stroke, sparkplug is dirty change new one if needed. Check carborator fuel line and fuel filter, both 2 stroke eat a lot of fuel waste fuel nature, weak engine power less space work to loud. Is it worth to fix youse, or Honda 4strokes stronger engine power .fuel efficiency, can work more space. Down side of 4stroke more expensive oil gas expenses, while 2stroke cheaper oil gas maintenance weak engine not efficient on work. And it s very loud to ear.