Cheap fuel pumps are junk!!??
ฝัง
- เผยแพร่เมื่อ 6 ธ.ค. 2020
- Make sure when you're replacing your small engine fuel pump you go with a factory mikuni brand. Don't waste your time or money on a cheap fuel pump.
The Mikuni pump you need:
Steel rebuildable one here,
amzn.to/3y1ni24
Plastic Briggs/Mikuni in the video,
amzn.to/44mo0Dj
For promotional inquiries: tepcocyclerepair@gmail.com - ยานยนต์และพาหนะ
Because of your test procedure found the problem with cheap fuel pumps, either not working or not pumping fuel correctly. Thanks!
Although your “5 seconds” to measure fuel flow isn’t consistent, this video did steer me in the right diagnostic direction to investigate an issue with a lawn tractor, so thanks very much! 🔧👍
Thanks for the info. This is exactly what I'm dealing with. I installed a cheap pump on my 20 hp Briggs V-twin. There's no fuel going to the carb. Yet, when I pour gas into the hose to the carb and reattach the line, it runs perfectly until the gas is gone.
Thank you for this ,ordered this pump and mower is working well.
Good information. Thanks for the extra steps to show us the difference.
Thanks for showing people this! It could cost them an engine if they don’t check the oil level to make sure gas isn’t getting sucked back into the engine!
Bingo ! I bought a ZT1 cub cadet. It wasnt running well because mice got up in the engine and chewed the coil wire. Previous owner said he put a new fuel pump on it . He gave me the old one (OEM Walbro). I was experiencing problems with the way it ran. I watched your video, changed the "NEW" fuel pump CHINA JUNK, and put the old Walbro back on, and it starts better, and runs great ! Thanks bro.
Thanks, bro. I bought cheap ones from Amazon and fix them into my generator. But the fuel problem was the same(not enough fuel pumping to the engine). As these were brand new ones I thought the vacuum system was the problem. Check the values and did many things spending almost two days. But the problem remains the same. Finally, your video solves the prob.
Thank you for providing a link to the correct part
Good to know! Glad I looked here before I submitted my order
Thanks man that’s awesome and great show in real world testing! 👏🏼
Thanks for showing this! People will be
Good video👍🏼
very informative
you save us time
Your vacuum line is cracked. Very good video.
Thank you so much!!!
With all respect to you for providing these troubleshooting hints, I did have some concerns. When you were testing the original remember that the pump was already primed so the amount of fuel delivery during this test would be more than when you tested the new pumps. Also I feel that the Pulse tube from the rocker cover should have been replaced before the testing to ensure that maximum vacuum was achieved. Other than that, your video provided enough information to allow for proper fault diagnosis. Thank you.
Yep impulse hose had dry rot cracks in it right over the fitting at the pump
I used the same hose for all the pumps, the cracks were on the outside and not all the way through. All pumps were primed before I tested them.
@@TepcoCycleRepair OK o
@@TepcoCycleRepair i purchased a low priced drill pump that did not work. Quarter the price of a sealed brand name pump. Disassembled it and a o ring was out of place. Reassembled it properly and it works perfect.
I learned this the hard way. Cheap one leaked gas as soon as i got done putting it on. Had to get the original to be the best one. And no leaks
Good advice,
Problem is Mikuni is junk too!!
Dealing these issues now, purchased a Oregon brand.. with the screws in side ,
It worked for a few hours then started with same problems as the old one that had been on the mower for a few years,
So I went down to a mower dealer & purchased the Briggs & Stratton brand ,
Just verified it was made by Mikuni,
It worked for an hour or so before giving me problems,
I can a switch the pumps back & forth and they may work for 5-15 mins before they stop pumping. And I’ve checked every other possible culprit for the issues,
So it has to be I got 2 💩 fuel pumps in a row,
2nd of which is the brand you recommended,
Even the guy at parts counter made a slight reference that they had recently received a bunch of bad fuel pumps.
Did you ever get the problem resolved?
Thank you!!!
Thanks for telling me that about the pumps appreciate it I'm doing the pump on my Brute Force 750 just about went bought the cheap one I'm definitely going to check my vacuum line cuz I seen that yours is a little bit cracked but it doesn't look like it's affecting yours but like I said Thank you for telling me about the pumps
If you have a brute force, around 2005 model that's not starting make sure you check the ground bus connector. I have a video on it as well.
Thanks for the video that allows me to spend more time doing what I love, and not fighting bullshit China plastic trash.
One time my dad was angry because he took the car to get a fuel pump. This was back in the late 80s. He was mad because the mechanic wanted to charge him a whole lot more than what HE thought that he should pay for parts and labor (my dad was a cheapskate btw). Anyway, I heard him say 'What is it, a gold plated fuel pump?!' I suddenly had a vision when he said that and busted out laughing. Michael Douglas and Kathleen Turner staring in 'The Gold Plated Fuel Pump' from Romancing the stone and the jewel of the nile. I laughed hysterically. Of course, my dad didn't quite see the humor in it and gave me that dumb look he always gave LOL.
That’s hella funny hahahah reminds of myself hahaha way u said it was hella funny 😆
Same problem. Watched your video and bought oem pump and temporarily fixed problem. Problems started again this year. Put a new vacuum line on , no help. Made a temp gravity fed fuel tank and it ran fine. Took an air hose and blew threw gas line before filter. Now its got plenty of gas. Have watched bunches of yt videos on fuel problems , but no one has ever suggested that. Guess Ill take tank off and clean. Maybe I should make a video.
I have found leaves and grass inside of tanks. Whenever I have a fuel issue, off comes the tank, flush, dry and fresh gas.
Even with name brand parts it is hit or miss. Nearly all are Chinese parts. Ironically, I've had one crappy "cheap part" that didn't work and one that didn't fit. I have had 3 "quality" Oregon/Briggs carburetors/pumps that didn't work right. I really think it's a roll of the dice anymore.
Yes they own everything here burgerking and home depo all of america and then we buy everything else we dont own our own country. No textile mills left no timber no oil or gas wells no jobs of pay unless phd to make $ for us or our country
You are correct with the hit or miss. I've tried the same thing. Some of the OEM parts are 'Made in China' as is the aftermarket parts. Most times when I've ordered aftermarket parts I have good luck. Sometimes I don't. But it's the same with most OEM parts too nowadays. Since I do the work myself, I take the chance. You win some, you lose some. But getting OEM parts don't mean it's gonna work like it should.
Yep. Good info.
I just bought factory pump today I hope it solves my problem of shutting down while mowing.
If it's shutting down while you're mowing like you shut the key off, check your seat safety switch. Thanks for watching.
Awesome, man! Thanks so much. Definitely something that would have me chasing my tail in the future! #stayrad
Got to remember these pumps come dry...you must prime the pump before you can say it isn't or is putting out the correct amount , also they are very low pressure so vacuum doe play a part plus motor running more vacuum..,so engine needs to run on a primed pump~! Just Saying~ just fix the jam tjing~ GriN
Understood, that's why I compared them as close as possible in the yard science testing center.
Thanks I work on small engines never changed one , now I know .
I just opened my carburetor, and it was clean as a whistle but had a ripped bowl gasket. I replaced the gaskets in the bowl and cleaned out the main jet. Same result. Is it possible that it's the fuel pump?
Ran into two out of five new ones of the “cheap” pumps that were bad right out of the pkg!
Exactly! Thanks for commenting.
thanks
I just used one of the amazon ones on the same engine. A day later there was fuel shooting out the muffler. I checked the oil and the dipstick was showing way full all the way to the top. Sure enough gas had filled the crankcase just like you said. These really are no good.
Thanks for the confirmation!
That is called an engine that is hydrolocked. Most likely, your fuel shut off solenoid is not shutting the fuel off to the carburetor when the key is turned off.
That's not what happens in these. The pump leaks to the pulse line and fills the crank case.
Nice to know. Even if the 1st junk one pumped enough to run the motor it would have been dumping gas into the oil sending the rod out the side. They certainly look nice but dangerous junk to use. Buyer beware. Mikuni makes great stuff, have their carb on the Harley. Thanks for the great vidoes and have a great day.
That's a good point I didn't mention, thinning the oil out. Thanks for watching!
Look to make sure that the pump inlet marked "P" (pulse line) isn't connected wrong. There's your dinner...
Nice tips thanks. I was wondering if you could mess something up if you tried to clean an original fuel pump with compressed air and carb cleaner. Because I'd did that and got it pumping fuel and it fired up and I used it to mow but now the oil on the dipstick smells like gas.
I have found that carb cleaner damages rubber diaphragms, and because it's vacuum operated, compressed air can damage it. Pull the pulse line and see if gas drips out, if it does you need to replace it.
@@TepcoCycleRepair Confirmed thank you. I suspected that , started thinking about it after I did it and pulled the vac line today after reading your reply and sure enough you were right gas came out. I ordered a new one. Thanks again ,new sub
@@backyardbuck6362 try to save a few dollars only to possibly damage your motor. go with an electric pulse pump.
I don't know if you know this you can run a little higher octane in your gas for that more to handle bigger jobs in thicker grass and it don't bog down as much even know it's running right Hustler raptor
your vacuum line fron the valve cover going up to the pump has 2 visible cracks and will lose vacume-
100% and why are we tipping the fuel pump upside down after connecting it. it has mounting bolts to keep it upright. im not saying those fuel pumps arnt junk, but i am being objective.
That's the way they are mounted and the hose crack wasn't all the way through, besides I used the same hose for all the pumps so it would be an even test.
@@TepcoCycleRepair
Those cracks in vacuum line might be whole reason old pump is not working properly .
My JD D130 starting stalling,misfires,stumbling after about 20 minutes of mowing. Wait 10 seconds, for cracked vacuum line to catch up, filling fuel bowl, runs fine 50 feet, then stalls again.
Found same cracks in my vacuum line.
Glued and taped with electrical tape, .mowed another 30mins, then tape got hot and lost vacuum-fuel again.
Motorcycles have the same vacuum operated petcock valve, any small leak shuts down whole fuel system.
Small crack in line , and diaphragm pump will fail.
(I noticed about 5 big cracks in your at :40)
Water in gastank will rust inside petcock valve, and cause it to get stuck in either ON or OFF position. Vacuum line can not produce enough force to move, if stuck in OFF position.
@@erniemckracken1593 A lot of ATV's use them as well. It's a common problem on the Suzuki King quads to go bad. I've bought a few to flip, just changed the pump. The cracks in the line weren't all the way through on the sealing part and I used the same line to compare as well as on the new pump I installed and is still working fine. Now I have a Polaris 325 over here now with a crazy fuel line, pump, petcock set up, almost like Polaris deliberately over engineered it, and because of that several probably sit in yards to waste away.
@@TepcoCycleRepair m
The link goes to a metal fuel pump. Do you have a good part number?
And what about that primer tube? Do you know where to get a good one that doesn't split in a couple of months?
Ok, I updated the links. The steel Mikuni link is rebuildable and I added the Briggs/Mikuni link like the one in the video as well. Thanks for the heads up.
Hi I have a question about a miller bobcat 225 welding machine, it start but when I put the switch in the off position it wouldn't cut off its still running.
Not very familiar with those but first thing I would check is the continuity of the switch to be sure it's operating as designed.
I took one of the cheap pumps apart and switched the big springs around and it pumps like a champ now, I dont have a you tube channel or I'd show u guys but u should try it it worked for me lol
Good to know, was it sealing? These were leaking as well.
👍
Ahhhh!!! Your link doesn't work anymore!!! I am repairing a mower that didn't even have a pump on it... so I'm looking for the vacuum line too.
Thanks, I'll fix the link.
Is that the primer line or is the no name made different and that is the out put line?
Never Mind
I bought a eBay fuel pump, for my Dodge Charger, after 2 weeks , rough start and over cranking.... bought the $200 fuel pump with lifetime warranty at auto store, pump now makes a “pumping sound” the eBay pump never did, and car works perfect again.... lesson learned
I ordered this pump, because mine smokes when it trys to run. Is this from gas in the oil? Also, what do you think about going with an electrical pump? I would like to see a video on how this is done.
If gas gets in your oil and it over fills it will smoke. Electric pump is overkill, I would just get a new OEM fuel pump
@@TepcoCycleRepair Thanks for the reply. I purchased the one from your link, along with the vacuum hose, hopefully you will get some points for it. Do I need to change the oil now? I have a hard time trying to figure out how much oil to put in as it takes a while to settle on the stick. I don't want to overfill it.
@@jawnTem yes, definitely change the oil. Just look up how much oil that engine takes and fill it by quantity.
If you put a new fuel pump on your riding lawn mower and it doesn't pump gasoline. What could be the problem? If I had a clogged fuel line to the gas tank How do I fix that? I think it looks like a little filter in the tank.
There is no filter in the tank of these. Pull the line from the tank to the pump, it should flow freely, if not, dump your tank and clean it out and blow the line backwards towards the tank. Then fill with fuel end recheck.
Have you tried a Carbhub brand? Most of their stuff seems ok...
No I haven't, I'll check them out. Thanks.
How are.you I'm working on a john deere 115 it's not a LA 115 there was water and fuel in the tank I cleaned all of it and now there's no fuel reaching the fuel filter which is at the left side corner of the motor when you Stat it still no fuel reaching fuel filter ease help
Empty the tanks and blow the fuel line backwards to be sure the line/tank is not clogged. If it's clear, make sure the pulse line on the pump is connected on both sides. If all that is good and you're still not getting fuel to the pump, most likely the pump is bad.
what about the purging step? or priming step?
I held it below the tank until fuel came out to prime each pump.
I have the Mikuni original fuel pump with B&S stamp on it. I also have a crack on the soft line going into the valve cover (vacuum line). My 24 hp B&S will not pick up any fuel from the tank, i mean zero fuel. Was hoping to just replace the soft line but read where you stated, "It's a pulse line very little pressure goes through it to operate the pump." Do you think I have a pump that has failed or something else. I've changed the fuel filter and checked all the fuel lines from inside the tank to the pump and to the carb. I can spray starter fluid into the hose that leads to the carb and it fires but nothing I try will get this thing to pump any fuel.
The vacuum line is the pulse line and shouldn't have any cracks or air leaks. It is very little suction but the pump needs it all to work.
👍👍👍👍👍👍👍👍👍👍YOU THE BEST👍👍👍👍👍👍LOVE YOU
Does the 4 screw unit have a rebuild kit?
Yes the Mikuni 4 screw can be rebuilt.
@@TepcoCycleRepair - Hi, thanks for the response. I was thinking of buying one but I cant find the/a kit. You have a part number by chance?
Would this work on a 25hp Kohler?
As long as it's a vacuum actuated pump. Some Kohler's have mechanical pumps.
I'd recognize that packaging anywhere........... those come from the wonderful land of China😁 Mikuni is Japanese made😊
what is deferent between 3 ports vs 4 ports pump? i dont see many for sale with 4 ports. can i use 3 ports pump?
A 3 port is line in, line out, and a prime line, that's all you need for a single carb set up.
@@TepcoCycleRepair
i got 4 ports pump, i cant find it. king Canada suitcase generator 2000w
@@vaninec So they only need 3 I'm guessing if yours has a 4th hose it's a vent for a diaphragm.
@@TepcoCycleRepair
It is for a primer pump bulb
Most generators don't have it
@@vaninec Ah I see, I don't think you need that. If it has a choke, just run a 3 line.
Anyone else keep rewinding trying to figure out why ( 2”” 5 seconds) bursts is really ( 1”” 3 second and 1”” 5 second) bursts. lol. 😂
Lol, C'mon I was counting in my head..
Did you replace the crack rubber vaccum (?) hose?
I left it on for the tests so all pumps were testing under the same conditions. It's a pulse line very little pressure goes through it to operate the pump.
What causes them to go bad what breaks in them?
The diaphragm is either dry so it doesn't flex enough, or the diaphragm is cracked/not installed properly allowing fuel to bypass it and leak into the crankcase.
@@TepcoCycleRepair Thanks
I 100% respect your review but I'm two seasons in with my "cheap fuel pump" and works at full throttle on my zero turn without any bogging and starving mowing every day of the week in Texas
The problem is that it's a crap shoot. Like cheap carbs, sometimes they work fine and sometimes they don't work at all and cost you more money because you assume it works and spend money on other things that aren't needed. With a factory pump, although more expensive, it will work. Thank you for the comment.
thank you test don"t guess
Hope that's my problem, fuel in oil❤
Most likely yes!
Looks like 2 cycle fuel or bad gas!!
So an electric fuel pump is less expensive than these anyway. I am questioning using this style.
These work fine if you use a good one, they will run for 10 plus years with no issues.
@@TepcoCycleRepair As I understand it, if the motor is old and has some blowby it messes up the pressure pulses and makes these pumps not work. That may be my situation. The electric one may allow me to get a few more seasons out of the engine.
The pump has no power source?
No, it's a vacuum pump operated by case pressure, which pulses a diaphragm with valves to move fuel.
Cut video and started back up - could have switched?
I don't play those games, all straight up in my repair videos.
why not just eliminate the fuel pump and do a gravity feed ? The carb should not overflow since the needle valve / carb floats wont allow to much gas in the carb.
Because on some the lower part of the tank sits lower than the carb and It also works as a fuel cut off. (I prefer an actual cut off so you can run the carb dry)
Your inlet and outlet are wrong.
Nah, not wrong. Been working just fine with the new pump.
Ok that was not 10sec on the second one
Maybe 9.5 but doesn't really matter, that brand new one was defective dumping fuel into the valve cover.
@@TepcoCycleRepair I have a 2010 Kawasaki mule 610. I’m getting 90psi engine compression. Do know if that’s usable compression or is it to low or high??
@@bradselc3618 It has a compression release so you can't get an accurate compression reading. I would say getting 90 with the compression release is fine. A leak down test is what you need for accurate reading of engine health.
@@TepcoCycleRepair I had a no start issues, checked pulse pump, carb, compression, spark and everything checked out ok. Spark plug looked good but I went and got a new one and bammm! Purrs like a kitten now. So it was just spark plug issues. Thanks man I checked out some of your videos and it helped me out!
@@bradselc3618 I've been finding more spark plugs failures lately, weird. Glad you found it, good job!
From the looks of that fuel, you aren't using ethanol free gas or you are a your station is selling you ethanol fuel and you don't know it. None ethanol fuel will be clearer that that was, the ethanol eats up parts in the pump and carburetor. Check into it, it will save you money.
I always use ethanol free. This was a customers, I always drain their fuel and fill it with ethanol free before it leaves my shop. I totally agree with you, fuel with ethanol is junk.
@@TepcoCycleRepair yep
So typical of many china made products, and can be hard to find quality anymore!!
Another solution would be a electric fuel pump.
Really good share!
Larry
The pumps your putting on are dry
fuel pumps is good ya might wont to change the tube that goes in the vale cover first lmao
The cracks aren't all the way through the hoses, and I checked both pumps with the same hose and even put the new fully working pump on with the same hose..lmao..
AFTERMARKET fuel pumps are not garbage. Just the ones you have, maybe? These pumps provide more fuel than is needed, so a pump that provides less than another, may very well be great.
BOUGHT THAT SAME CHEAP FUEL PUMP. CANT GET IT TO PUMP FUEL. PIECE A SHIT. MY OLD MEDAL ONE WORKS BETTER. THANKS FOR INFO. TEXAS.
I purchased one of these pieces of shit! It’s criminal. I couldn’t find the authentic brand or else I would have purchased it. The fuel would not even come out!!!! Than the plastic hunk of shit broke at the fuel line! Which was actually why I was replacing the original part !! Than the bf wouldn’t let me but the right part due to price.. so on another go of this hunk of shit his telling me it must be something else wrong with it! I’m saying NO it’s this hunk of shit part! Thank you because he believes me now and said sorry for making me but this Hunk of shit!
Yeah these are junk. The factory one should be a Mikuni.
Shit.😂
liar
Nope, confirmed junk.
Sorry, but I have to disagree with your video. I’ve used the cheaper pumps without an issue for years. It doesn’t matter how much fuel is coming out of the fuel pump. As long as enough is coming out of the fuel pump to keep the carb bowl full of fuel. The float and the needle valve control the flow of fuel into the engine, not the fuel pump. As long as you’re getting enough fuel into carburetor you’ll be fine. I’ve never had an issue with one and I’m not paying five times as much for a Briggs & Stratton that are made in the same Chinese factory. perhaps you weren’t getting as much fuel as you expected because your vacuum pulse line has obvious cracks in it. The pump I prefer are made out of metal and can be opened. Cleaned repaired and rebuilt if needed. I’ve never had to do any of that to them and I’ve had them on my machines for years if your motor surging you have carburetor problem and as you mentioned, you had water in the gas that has nothing to do with the fuel pump. Sorry if my comment contradicts your entire video but I want people to know what you’re telling him is not necessarily the case or at least it hasn’t been for me I will continue to buy the metal case Chinese pumps. You really have nothing to lose. If you purchase the pumps from Amazon if you have an issue or don’t like them, you can return them. Try that at your Briggs & Stratton dealer.
The metal ones are probably better. These also leak fuel through to the pulse line filling the crank case with fuel. I used the same pulse like on all the pumps, they show cracks but they were not all the way through. I'll try a metal case aftermarket pump but these plastic ones are usually junk. I've had them leaking straight out of the box and/of not even pumping. The metal ones are probably like the Mikuni pumps, rebuildable and better quality.
@@TepcoCycleRepair try a metal one. I’ve never had an issue with them and they’re much cheaper than a Briggs part. Good luck. Thanks for the video.
Would have been nice, if you provided the Mikuni or Briggs and Stratton part numbers.
I put a link in the description. Thanks for watching!