Fixing A RedMax Backpack Blower That Won't Start
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- เผยแพร่เมื่อ 29 ก.พ. 2024
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Thanks for watching. This Redmax backpack blower came back to me and this time it's out for vengeance.
This video is meant as entertainment, always practice safety. - ยานยนต์และพาหนะ
2 years ago I watched one video now I can’t stop buying broken small engines and fixing them.they are so relaxing to work on
now you understand how I feel.
That was really strange, im curious as to what would cause a flywheel to malfunction? I gotta say you have an amazing amount of patience. Awesome job diagnosing the issue.
thanks and I wish I could answer that question too.
My guesses, The factory coil was designed to work with the factory flywheel. And when someone changed the coil to aftermarket, they decided to replace the flywheel (that old flywheel looks suspiciously clean. And the new flywheel wasn't matched to the new coil to work properly on this engine (timing).
Alternative guess. the old flywheel has it's magnets in N-S configuration where the new flywheel is S-N magnet configuration, screwing the timing. @@HomeGaragechannel
This is definitely a head scratcher. You made it look easy to fix. Great video to demonstrate persistence. Thank you
thank you!
A friend of mine tried to repair a sthil straight shaft trimmer, that would not run, changed the carb, spark plugs, coil, still nothing would get it running. Even compression was good! It was a waste of time and effort, so it was junked. Surprisingly this blower almost checked the box of trashing it. You have great patience regarding these tools.
thanks, it was certainly pushing it very close to being junked
I was right there with you all the way and like you, STILL was not convinced what was wrong. The different timing key positions threw me too but the end result was that it LEFT!. Never been in that position before but never worked on a REd Max either. My pal at his saw shop says they can be a pill but otherwise a good machine. Glad it's gone but I never have gotten along with the 2-barrel carbs either. Happy weekend!
yes you're right, the double barrel carbs just seem a bit to complicated for a small engine.
For me they are. Just proof that people will NEVER leave well enough alone. @@HomeGaragechannel
A real head scratcher! Good job.
you got that right
Hey brotha. I love your videos and if I’m honest, I watch em every day. They are very entertaining and seeing all of your equipment and learning and seeing how all parts of the engine and carburetor work is just really cool. Have a good one and keep up your hard work!!
Awesome thank you!
@@HomeGaragechannel oh yeah!!!! Your very welcome
I would’ve gotten very frustrated hopefully that blower will be fixed for a very long time hopefully it won’t come back watching this video even I was scratching my head you are definitely a great mechanic I’m glad you have a lot of patience I don’t know if I would have been as patient you are awesome I like watching your videos it’s relaxing
oh believe me, I was loosing patience near the end too.
I'm hoping that my out come is same as yours. Thanks for the well described video. It's a great machine when running. Hope it ru s again🤞
good luck with it.
I have such a simillar story on a mower that started in the morning and had fresh gas would not start no matter how I tried. It only back fired through the carb and I squrtied fuel into the intake and the key was not sheared there was plenty of compression at 130psi and the engine was fairely new at 3 years old. There was a strong spark and I checked the carb and the valve lash but nothing semmed to work I just gave up on it. There was no water in the fuel and the oil was at the correct level. Anyways you are my favorite youtuber keep the awsome videos rolling in!
sorry it didn't work out and thank you !
That’s a new one on me. Holy cow. Good job!
I know right!
You're the man, you made it!
thanks!
I think your being thorough got it going yet trying to figure out which actual step fixed it is frustrating since the fix could be applied to future machines. Great job.
I have to agree with you.
TY for Sharing
no problem
Thanks
no problem
I have a hand held blower of a different brand that is having similar issues. Sometimes it struggles to start but will start and eventually run ok when it gets warm … until it dies and refuses to start again (hot or cold doesn’t seem to matter). I finally gave up on it about 4 years ago, purchased another blower, and stored the old one to someday look into when I wanted a project or had some epiphany of what might have gone wrong. Before giving up on it, I also replaced the coil and carburetor, cleaned the muffler screen, checked the piston and ring, as well as the flywheel key and tested the shutoff switch and wires. No change/no differences. Maybe I also have a bad flywheel? I have never experienced a bad flywheel that was not physically damaged.
after this video and after hearing everything you've done, I'd give a new flywheel a shot
Craftsmanship mower but that thing we bought a coil we bought everything for it and that darn thing wouldn't run one time or would run the next time we had to strip it and throw it away. My sister bought it up in New York it was used for 60 bucks I can't get it started for the longest time and he finally got it wrong and he sold it to her just like that I told her she should have Runaway thank you for the video
no problem and thank you for sharing that
My experience is very similar to yours. I rarely get anything with odd issues, but unfortunately I have four of them with odd issues at the same time right now. My yard art collection is getting a little excessive.
yes, as much as I enjoy a challenge, after awhile it stars to get a bit tiring
Yes,I rebuilt a Stihl hedge trimmer for a nursing home that my auntie worked for & my dad did some work for after he retired from his job as a fitter.
The ignition coil was gone & I ordered an aftermarket ignition coil & the engine still didn't start even after rebuilding the engine so I got the serial number off the hedge trimmer & I did an online search to find out that Stihl changed the ignition coil & the crankshaft so that they're a matched set because the keyway was milled in a different position.
I ordered the older OEM Stihl ignition coil from an eBay seller who was located in Ohio in the U.S. & when I fitted it ,the hedge trimmer fired right up.
I also had trouble with a junk aftermarket carburettor which I ordered from an eBay seller whose located in Melbourne in Victoria, Australia , it appeared to be glued together with Loctite which the fuel ate so I ordered a new $30 AUD carburettor from a seller who was even located near me in the central coast of New South Wales & it was a good carburettor.
Apparently the machine still runs over a decade later,I learned, try not to buy lawn equipment parts off a Muscat online !
great lesson!
I thought it would been a air leak.Great video.
that was a very good possibility too.
I have a Red Max 7500 leaf blower and mine works great so far. Any videos is like catnip for me so I'll be ready when mine goes bad and it will go bad someday.
thanks and it's only a matter of time. Everything will fail eventually
Well thank you for that video , I have 2 of the same exact blowers one runs perfectly , the other I found at the dump I have been working on it. I can eventually get it running but very hard to start I have tried 3 different carbs new plug checked flywheel gap. The spark and compression are also good 150#, Its sitting in my shed , when the better weather comes I think I am going to order a flywheel. Thanks Can You put a link to the same model flywheel you used please.
sure thing.
amzn.to/42ZOeux
Thanks to your previous advice I was able to get my ECHO PB250 up and running. I cold started with carb cleaner then added pre-mixed Tru-Fuel to the tank. The blower started right away. The idle is at 2800 and top speed rpm is 6600. However, in about 2 minutes the engine gets very hot as does the case near the exhaust muffler. I mean the outer cover gets very hot to the touch unlike another blower unit I own. I think the problem is the muffler that may be clogged. The spark arrester is pristine. Can you suggest a possible cause for the overheating?
have you checked the rest of the cooling fins are clean? If so, the fuel mixture might be "lean" and adding adjusting for extra fuel will keep the engine from getting too hot
@@HomeGaragechannel The cooling fins are clean. The fuel is a commercial pre-mix. I'll try the carb adjustments. Since I have 2 leaf blowers I'm going to do a timed temperature test on the exhaust gases --- measure the exhaust temp after 1 1/2 minutes run time on each.
Update--- tweaking the carburetor high side improved the top speed and maybe it's wishful thinking but the overheating seems to be less so.
I’ve had similar situations where I wasn’t sure what I actually did that made it run for sure, but I was just glad to move on and be glad… lol
I hear that
Hey, I have Ryobi trimmer it is only working on half Choke or full choke when I put it in run it stops what could be the reasons for it?
yes the diaphragm in the carb is beginning to harden. If you can see the fuel adjustment screws you might be able to compensate for it.
Nice video 👍👍👍
Thanks for the visit
That was something i wasnt expecting to happen to it
I know right, it was really strange
I have a question. I have a Husqvarna 5521 BBC push mower and it has a Honda motor on it and was wondering how hard it is to replace the blade clutch
I've never had to work on this style of blade clutch before but it looks to be "mildly" difficult if you have some experience and "tough" if you don't have any experience
@@HomeGaragechannel thank you
There are 2 small plastic spacers that go in between the coil screws that mount to the engine. If not installed, there is a chance the coil will hit the flywheel or not "square itself" when the magnets go by the pickups. Just food for thought. Again, I enjoy the content.
yes I was aware of the spacers, they somehow got edited out by mistake
i have a very specific idea of a set of events that could have caused this problem.
i know neodymium magnets have a curie temperature of about 310-370 C in which all of their magnetic properties are permanently damaged, but they can actually start losing magnetism at lower temperatures in fact.
so if the carburetor started failing before and started producing lean mixtures or even if the owner was being really hard on the blower, it might have overheated the engine, perhaps causing the damage to the flywheel magnets.
this would have also caused the lower than expected compression readings if it damaged the internals of the engine.
all a guess though but i do like the problem solving.
that is a possibility
Did you try putting the original coil back on with the new flywheel?
yes I did, and it didn't matter. The raw video for this one was well over an hour and 20 minutes before editing and I tried a lot of different combinations
@@HomeGaragechannelwith the original coil installed on the new flywheel, did it start?
I'm having trouble repairing an ECHO PB250 blower. It won't start even if I squirt fuel into the carb. I found that the shear pin on the flywheel was stripped. I replaced the flywheel and shear pin with no positive result. I replaced the carb, fuel lines, and ignition coil. The engine will not start even with fuel sprayed into the carb. So, it has fuel, air, spark, and compression but it won't fire up. Do you have any suggestions?
sure.. don't forget that with each failed attempt to start it before you replaced the flywheel, floods the engine. I would try allowing the engine to clear itself over time.. or you can help it. Do not add any extra fuel, or use the choke and make sure the throttle is set to full when you try starting it. You'll have to do this a couple of times over the day(s) and only after that then try using the choke to start it. If it still won't start you'll need to do c compression test to get a reading.
@@HomeGaragechannel Thanks for the advice. I will do as you suggest. As for the compression, I have a good blower of the same model as the bad one. The compression on the bad unit is 110 to 120. I saw your video about fixing a stuck piston ring. The piston still has the factory hash marks and just minor scoring but the ring has a dark crust on it. Could a stuck ring cause a no start problem? BTW I watched the video you made on how to clean a piston ring. I really like the detailed way you talked through it.
thanks, and yes I feel like a piston ring that's not clean and possibly stuck would have an effect on the engine starting
It seems crazy that the timing difference in those flywheels would cause it to run with the aftermarket one. However, I went back and re-watched the video from last year, and the inside of that flywheel looks A LOT worse in this video - video can be deceiving compared to in person - where the inside of the flywheel almost looks like it was sliding on the key itself. It could be from the video/lighting/etc. Curious if you still have the old one, if you are able to give it another look and see. That could explain it possibly?
unfortunately this video was filmed over 6 months ago and it's long gone. I'm also pretty certain that I give them the Original parts too, but I'll have to look around to see if they're still here.
i’d like you to put some cling wrap over the magnet area on the flywheel and drop some fine metal fragments onto the magnet surface to see what the field looks like.
hey.!! that's a great idea.
@@HomeGaragechannel i grind some steel into a plastic container with a grinder
Backpack leaf good job
I'm going through the same problems with the same exact machine.
sorry to hear that
What we don't see in the side by side of the flywheel is are the trigger points the same or not. The key being 180 out is a little to weird for me. 😁
I know right!
Yeah I gotta say on these blowers it's becoming common especially when they use that crevice tool that restricts air flow or adding extra long tube puts a strain on the engine. Im 90% sure that is the point of failure of almost all the Blower flywheels as I don't believe they were designed to create such backpressure onto the blower itself something's gotta give .
But to answer your question yes I've come across a lot of small engine enigmas that I couldn't figure out the cause. Back then II didn't have the tools, and spent countless hours on stuff that had 0 compression or compression that was too low to fire. I spun my wheels, dumped hours on them but I'm a better person because of it, in the end.
wow, I really appreciate your perspective on the matter.
Yes it has happened to me to bro 2 times ona a ms170 Stihl chainsaw I used it but didn't clean it the next day I went to use it and it didn't want to start and I started searching to loose cable or gas leak ect.and the problem was that it needed cleaning when I cleaned it it started and until now it hasn't happened again because I don't let it get dirty . the second time was a 250 and it had like 30 minutes that I last used it when I go and start it it didnt even try to start so i did the same thing with the other one but that was not the problem the problem was that it was flooded so I unflooded it and it started my question is why did it get flooded on hot start and I didn't use choke to start it on hot because it's only for cold dtart
thank you for sharing that
Can you try it with the old flywheel again and see if it really was the problem? Because to my eyes it looked totally fine.
unfortunately this video was filmed over 6 months ago, and has been long gone
@@HomeGaragechannel ok, thanks for the info
I think we’re all at a lost with this one my friend.
glad to see it wasn't just me.
Have a similar issue with a redmax ebz5150rh. This blower will not start.
Story with the blower, I got it with the recoil missing.
-First thing I did was spray fuel down carb throat & spun by drill. No start. (Primer bulb was pulling fresh fuel).
-Next checked the spark plug (bosch) & found no spark. Disconnected kill switch wire, no spark.
Replaced coil, has spark (Looks a little weak). Added a recoil to machine & noticed it was hard to pull with spark plug in. [Easy to pull with plug out]
-Retried spraying fuel in carb no start. Perform compression test with drill. Got to (100psi). Removed exhaust (inspected no clog) & saw no scratches on piston. Decided to go deeper in & saw 1 deeper scratch on piston.
-Replaced Piston & rings. (Compression 125psi) Retried the fuel in carb had a pop but no start with throttle wide open. (Even tried with exhaust off). After that pop, it will not pop again.
-At this point, research more & discovered about potential flywheel issues. (Mine has a scratch) Replaced flywheel & spark plug with NGK. Has a spark (similar weak looking spark)
-Now at this point, I'm stumped. Before deciding to tear carb apart, the blower should have at least popped over with the alternative fuel source. My next step I'm gonna try is disassemble the intake to check for blockage & see if the recoil can spin easier.
[The only other theory I can think of is that the fuel is causing the spark to disappear].
did you ever compare both flywheels side by side? When I compared the new one to the original one, I noticed the key was about 90 degrees from the original one. I thought they sent me the wrong one but after installing it, It runs now!
@HomeGaragechannel I compared it & they were similar. The old part # I search was discontinued & showed me the new part # to get. It looked exactly the same but without the wear. I researched online & people mentioned that these redmaxes have the same common issue.
yes I agree with them. After using and working on this blower, I would not recommend them as they seem to have a lot of issues. as for your situation, I think there's about 3 ounces of fuel in the engine. Basically it's flooded beyond belief. you'll need to let it dry out or try clearing it before moving on.
Flywheel from what it looks that you replaced it with the other one seemed to be completely 45° out of timing so the question is who molded the original flywheel wrong and put it in the machine to begin with??
I know right!
I literally got the same blower that won't start n after tearing it apart I am going check the fly wheel cuz I tried everything that can be possible..
I know how you feel!
Otherwise I would've thrown it across the yard n called it a day!
Not being able to repair a piece of equipment happens to me about 2 or 3 times a year. Extremely frustrating spending hours and hours and only being compensated for partial amount of time involved.
I hear that
You fired the proverbial PARTS CANNON at it I have seen head gaskets fail on those or bolts become loose.Should have better compression
for me it was only 3 parts, I think it was good choice. and yes the compression should have been better. I'm sure not letting it warm up is the cause for that issue.
When you first put the aftermarket coil on you forgot the two plastic spacers behind the coil, but in some other shots I see them on, pretty sure you got it put back on but just letting you know
thanks for letting me know
There's a reason I don't buy Husqvarna products and one of them can be reliability. The other verified reason is the parts are expensive for the quality. For example: a cable for a snow blower chute the OEM was CA$85 at the time I wanted to replace it so I went with an aftermarket unit. A heavier duty cable for a Honda RotoStop blade brake clutch on a Honda commercial made a few years ago or HR214SX made in the mid-1980s was only about $40. MTD parts were and are more reasonable as well. Most of my equipment that I have now is Honda, Cub Cadet and Echo.
you make a great argument
So wait... it ran with a different flywheel with completely different timing? I have to think that one through a bit
you and me both. I had a long discussion with the owner when I noticed the key way position. At that point, It couldn't have made it worse.
@HomeGaragechannel That is the single most surprising thing I have seen yet on TH-cam. I had to go back and look again, it's not 180 out... I am baffled
My EBZ 5150 won't start I've changed the carburetor, air filter, spark plug, and it still won't start. Im about to pull the ignition coil next. Im at a standstill with this blower.
don't worry, you're doing it the exact way you should.
@@HomeGaragechanneljust pulled the ignition coil, it's reading replace on my meter. Hopefully problem solved
Feels like someone put the wrong flywheel in it somewhere along the way.
I wish that was the case
lol. the flywheel key slot was manufactured wrong at the factory, or part mix-ups happen too. this is nothing new i happens a lot with me. plus the flywheels shown where machined different, this happens at factories too especially when they manufacture different engines or make changes in design.
it would certainly seem that way
10:35 Imagine you put the whole thing back together and it stopped working
I would have to have a serious talk with the owner
@@HomeGaragechannel Yeah probably
Just get the feeling someone else was in there fiddling around !
just me from the last time, but I mainly worked on the carb in the video from the year before
that's a new one never seen a flywheel lose magnetism just physical damage worst i've seen was a briggs flathead where it was almost cracked all the way through from both sides of the crank bolt that one must have been magnetically weak from the factory
you might be on to something. This blower has been a hassle to start ever since it came out of the box.
It could be a defective flywheel
yes that was my thought too.
Good fix that
From someone that runs Redmax day in and day out that’s a first must of been something wrong from the factory
yes I agree with you, they had problems with it from day one.
Maybe bad quality control
I have to agree with you on that.
But it ran before? That's real strange. And the new flywheel is oriented differently. Chinese magnets? Or an updated flywheel? But it ran before with the original which is strange. I really hate those fixes where nothing makes sense and it comes down to luck.
so this blower was a problem from day one. Sometimes it would fire up and other times it wouldn't. I happen to thing this one was a lemon from the factory