How to Diagnose Bad Fuel in a Riding Lawnmower
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- Опубліковано 19 лис 2024
- Step by Step!
Today we'll be diagnosing a John Deere L110 riding lawn mower that's running rough.
Instead of draining the entire fuel tank and replacing it with fresh fuel, I 1st need to diagnose whether or not the customers fuel is bad, and if that is what's causing the engine to run poorly.
By using a small test fuel tank of my own design, I can isolate my customers fuel. If the engine runs better with my fuel hooked up, then the source of the issue will have been identified.
Testing Ethanol Content: • How to Test Ethanol Co...
How to Easily Drain Fuel: • How to Easily Drain Fuel
Mr. Funnel - Do They Actually Work?: • Mr. Funnel - Do They A...
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Very well explained and simple diagnosis. When I was in my apprenticeship, my boss made me make my own siphon to hook on my blow gun. I used it to clean either coolants or diesel fuels out of heads, top of pistons or blocks. Still use it on the small engines. I like the idea of the wire to stiffen tubes. Have a good week. Rick
Thanks for watching and posting this comment Rick we really appreciate it.
Well done sir. Amazing how poorly that engine was running with the old fuel compared to the fresh 91 Octane no ethanol fuel up put in your test fuel tank. This method can easily be used on any engine even if gravity fed instead of by a fuel pump. This condition is always the problem on fuel operated generators since they rarely get used (having normally a fuel tank of old broken down fuel) but if the customer has been using no ethanol fuel then there will be no ethanol build up in the carb and it will not require a carb clean.
Thanks for watching!
Good day Fellows I think 1 gas station in St. Jacobs here sells 87, 91, & 93. I will have to check. Boy that would make the Ford move! LOL Good video. Thanks
Commented to soon. Mr funnel I do not trust 100%, I guess better than nothing. Thanks
@@donvoll2580 don, you have to get the original mr funnel, make sure it's not the copy cat aftermarket one on eBay or Amazon
I like the remote fuel tank. A great tool to have. No stone left unturned in your diagnosis. What I would want you to do if I was paying for the repair. What I would do if I did the repair myself. Quality counts. Good work.
Yes It's quick enough and saves me time from tearing down a carburetor that clearly didn't need any work! Thanks for watching!
Why not remove the float bowl to confirm it's as clean as possible?
👍🏼my LA120 is on the charger now. I suggest changing the Fuel Filter too in this case.I got a Full Jug of gas from last October!!hope for the best!!expect the worse🙏🏼
A good diagnostic video. I'm sure that fuel wasn't very pleasant at all
Your own fresh fuel.
Nice.
This is explained beautifully.
That was a great idea to bench grind a custom wrench to make thinner to get to places.
You lost me with draining the old gas.
I thought there would be way to just let it drain out like oil.
Nice video Jake, its amazing what fresh can do. 🙂👍
Thanks for watching!
Anytime, looking forward to the old man being in another one. 🙂
nice job....lots of great tips for small engine repairs..
Thank you for this, wish I would have found this awhile back but this helped me tremendously.
Merry Christmas to You and family
Thank You’ll for all the videos
Thanks for the kind words Phillip, happy holidays to you and yours!
As I watch there has been 338 views BUT ONLY 72 thumbs up......... What's up with the lazy folks that WON'T give a thumbs UP for content that is ALWAYS Quick, Detailed & Expert ???? I ALWAYS give a Thumbs Up even B4 I watch because I KNOW it's ALWAYS 100% great content
Thanks for watching and liking!
Great video. Can a bad fuel pump cause the mower to run slower ?
Great video. Thank you 👍
Thanks for watching!
Informative video..question for ya..my jd e120 ran out of gas..filled it up and it wont turn over now.fuel will shoot from the pump when i remove hose so im pretty sure theres no issue with fuel flow.the gas i used was only a few weeks old,used it in my push mower and it worked fine..any idea what the issue could be?i didnt try taking the carb bowl down yet
I would check the oil level, if it's high and smells like fuel you could have a flooded crankcase due to a leaking needle valve?
Your way is best, but I'm lazy, I put a ounce of seat foam per Gal of fuel in the tank & run the junk on through, I have HUGE problem here in Florida with condensation building up IN the tanks even though I ALWAYS use NON ethanol
Yes instead of trying to rejuvenate this fuel, we just get rid of it. It's not worth the time and money if it leads to further hassle and poor running engine
We find that SeaFoam is great at cleaning carbon but not a great fuel stabilizer. We use K100S+ and put 3.25 ounces of it into 19 litres of no ethanol fuel but store it in NO SPILL fuel containers that have no vent. They expel any pressure when you push the fuel release button and no issues with water condensation. All our stored equipment we own has vented fuel caps of some sort but again they fire right up after 6 month storage and no water condensation problems. Florida does have much more humid weather but maybe switch stabilizers.
The problem I'm running into for my John Deere E100 that won't start is the fuel is not pulling into the fuel pump from the fuel filter. Now, the solenoid on the bottom of the carb doesn't make the clicking sound when I turn the key from off to on. I've taken carb apart and cleaned it and the little plunger in the solenoid is free moving, so not gummed up by bad fuel. With that not activating, will it keep the mower from starting? If so, would it be the solenoid itself that needs replaced even though it's free moving or the little electrical harness connected to it since it doesn't activate with key turn?
My Cub cadet has a plastic gas take on it. When I got the chipper it didn't have any gas at all in it but I could hear something in the tank. I disconnected it the tank has plastic pieces in it. Looked like it came from the gas tank, but the tank looks new. Anyhow I cleaned it out put knew gas. Should I be worried I started it a couple of times before cleaning the tank out. Do u think I messed it up? And what should I do next
Great tips!Appreciate it!
Great jake fresh fuel rule
Thanks for watching!
I have a strange one . My neighbor asked me this morning. He has a 24hp Kohler commander, on a lawn tractor . Runs and works great. Until he refills the tank. Then chugs and runs very rich for about 10 minutes ? Any ideas ? Removing the fuel cap, did not help
Any advice would be great
do you think marginal fuel would have it run ok at no load but then cut out when under load? My neighbour's having an issue with a columbia zturn with kohler kt730 twin. Thought it might be the low oil system as he was just on add mark. With fresh oil, new air filter and new plugs it starts and runs full speed , noload. May cut light grass but wants to falter in the longer stuff. Says it may recover if he stops mowing. Sometimes it restarts immediately or has to sit a bit. My next idea is to change the fuel filter. Wondering if I should drain tank and use new ethanol free fuel at the same time.
Yes 100% I had a zero turn come in for service in spring, customer had fuel from previous year. Ran fine for me, blades engaged I drove it around driveway no problem. He gets it, says it's got no power while cutting. I drove down to have a look, you could hear the rpm drop when it was under a load, very different than running the deck while not cutting. Bottle of Octane boost dumped into the fuel tank took care of it within a minute. Also some fresh 91 ethanol free to top it off.
Wondering if you have a winterizing video for lawn tractors?
I do not think Jake has at this time but here are a few tips: use ethanol free fuel only there will be no breakdown so you do not have to run the engine out of fuel. Make sure your underside of cutting deck has been cleaned otherwise rusting from the bottom up continues during storage. Blow debris off top of deck for the same reason. Pressurise tires to the proper psi rating if tires do not hold air we suggest having them repaired before storing so sidewall cracking does not get worse. If you have mice in the area place Downy fabric sheets, pepperment oil or used peppermint tea bags around the engine cover ( one mouse nest can cause catastrophic damage to an engine). Just a few ideas for you Gregg hope they help.
Should gas flow out of the tank fuel line when disconnecting the line from the fuel filter?
Can you use fuel stabiliser in the fuel tank
Thank You!!
Thanks for watching!
Good Job
Thanks for watching!
Is there any chance you have a mower laying around with a snapped wire and broken lever PTO? Mine broke and I can't get parts in Australia so I'm trying to think of a way to fabricate some sort of Pto to engage the blades and get the ride on working again. Cheers
Lots of the cables you need over here mate. I believe you need a cable with the spring on one end and the ring type fitting on the other end. Look for the part number right on the cable sheath covering or can you give me the part number you need?
I got some bad gas (water in gas) . My riding mower ran fine until I added this bad gas. I drained my gas tank and put in fresh good fuel. It makes noise but will not start. What now? I have no one to ask. Any advice what is wrong? I thought draining it would fix the problem. Thank you
You probably have bad gas in the carb, I would also recommend removing the spark plug and possibly changing it
Thanks man for sharing
Brilliant!
My HUSQVARNA 22 horse runs without the vaccum hose attached to feul pump. How come??
It's possible with enough fuel you may get some flow... You'd need suction at the carb side to get it to draw under load though without a fuel pump. Interesting. Usually a hole in the fuel pump diaphragm leads to fuel in the oil because it goes through the vacuum tube into the crankcase.
@@EliminatorPerformanceI had an issue with my mower shutting down while mowing. I thought it was feul delivery. Long story short it was these rods getting stuck. They are connected to the safety switches at the control levers. It's hard to explain bc I don't know the name of the rods. Anyway the switches would open or close when that button get pushed in and ground out coils
Jerry i never heard of this one before, like Jake says below you can only be getting some gravity flow unless that engine has a mechanical fuel pump give us the model number of the engine we can check.
@@waynestefinashen239 i just seen your reply. Sorry i took so long. I'll see if can find the numbers in my phone. I do have them tho
I don’t know, Jake, your method seems much too time consuming and complicated. I’d just gravity drain by disconnecting the carb bowl into a clear container to eyeball the fuel. I’d also use my turkey baster with hose attached to get a separate sample from the bottom of the tank to confirm. Also dripping some on some pavement or a brick or cinder block outside to see how it burns. Those tests would confirm bad fuel without running the engine any further after the initial run to confirm ignition and compression. Am I wrong?
Fuel usually burns just fine, it's how it reacts under compression can determine if it's bad. So I spray carb cleaner to get running, runs like crap, change fuel source to prove 100% whether it's bad fuel causing the issue, because I know my fuel is good. If the engine continues to run poorly, then it's an issue with the carb, ignition or compression. To swap fuel takes about 15mins and then to drain the fuel another 15mins. My customer was into the fix for about $55 once I diagnosed and drained the fuel, added 4 or 5L of our own fresh fuel
Don't think so Rein it was pretty quick but the video made it appear longer. It is like when your on TV you look much bigger than you really are, so if you ever see me on i am not really that large eh/
Never fill your tank to the top capacity. Mark more or less the amount needed to do your lawn and fill to that mark. Use a higher octane gas with Sea Foam and you will will have a healthier gas and engine!.. works for me!…
The old saying, if it smells like s. Then it is just that S
👍👍👍
Thanks for watching!
If fuel is three months old dump it
It’s just that simple now
Some even at a month also
Why not just drain some fuel into a glass container ? Water or dirt shows up.
The whole tank was bad fuel, it was over a year old. My customer had found an old Jerry can in his garage and decided to use it in the mower.
Don't show how you doing the hous, which hous is dranind
"Corn based alcohol" is irrelevant. Ethanol is ethanol regardless...
Yes but about 95% of all ethanol comes from corn, so I add that in so people know what it likely comes from. Most people don't even know that ethanol is an alcohol, or that it's made from corn.
@Eliminator Performance and is the same alcohol that we drink aka ethyl alcohol. The reason I clarified that the source is irrelevant is because many people think that because something like sugars that come from corn are of a lower quality or are unhealthy. Weather or not sugar comes from gmo crops is also irrelevant because a specific type of sugar or alcohol has a chemical formula that is what it is regardless of where it came from.
@@jsnthurst1 no there's 2 types of ethanol, food grade and fuel grade from what I've researched.
it's gas
i wish u'd get to the fix faster instead of going on and on about fuel. we get it its bad. make for a shorter vid, but a more useful one. cut down the talk, get to the fix.
it's is gas
There is good gas and bad gas, even stabilized gas goes bad after a period of time. Best fuel to use for storage is alkylate fuel.