How to Test a Fuel Shut-off Solenoid
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- Опубликовано: 8 июн 2018
- Step by Step!
In today's video, I'll be showing you how to test a riding lawn mower fuel shut off solenoid.
This test is super simple, and you'll only need a couple of things!
1. A minimum of 9 volts of power (I'm using a 9v battery).
2. A couple wires (I'm using the back up battery plug from an old alarm clock).
Simply supply the 9v minimum to the negative and positive connectors, and the solenoid should move.
If it just has 1 connector, then supply your positive to that connector, and put your ground wire to the base of the solenoid, thus completing the circuit.
Follow these steps, and you should be able to test your fuel shut-off solenoid in a couple minutes!
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Thanks for posting this - I used your 9v battery test today to check my fuel shutoff solenoid today. Mower wouldnt start and the solenoid was gummed up. I removed the solenoid and cleaned it and did your battery check to verify operation before I reinstalled it. Thanks for the instructional video.
Thanks for watching, glad it helped!
Tanks for your video. I did the solenoid test on my work bench. Worked fine. Put it back on mower and it didn’t work. Traced the wire and found a loose connection.. All good now!! Thanks 😊
Had a problem with no fuel, did this and it worked great. Saved $$$
Thanks for watching!
Thanks EP Just Got a Used Mower That Fires Initially for 1-2 Seconds & Shuts Down. Previous Owner said Ignition switch was bad which looked bad. so New switch same problems . I suspected the Shut Off switch & was Glad for your vid.I contemplated inline valve & open solenoid & Glad you had it shown. Thanx
Awesome video. Thanks for sharing the knowledge that helps solve issues that can drive some nuts or cost a bunch of money for repairs at a shop. So simple and cheap to fix or remedy mower not running. Thanks
Thanks for the solenoid testing tip.... Was gonna use my multimeter, but your video popped up and seemed like a cool truck. Thanks!
Brother thank you for explaining the function of a fuel solenoid I just bought a walk behind and I was not familiar with this particular thing
Fantastic video. Great narration. Very clear information and the video too. I will use your info on my used mower that won't start... thank you very much.
Thank you that is one awesome video you don't know how much you help me out
Fixed my problem, mower cranked fine… but won’t start…but would briefly start/run if starting fluid was sprayed into air intake…so obvious fuel issue. Removed and worked solenoid plugger with pliers until free, reinstalled, mower started and ran fine… problem fixed. Note this mower sat unused for 2 years… gas turned to varnish and froze the plugger…drained carb bowel and tank, easy clean and fix.
Thanks
Frank
I test them by hooking back up to the wire harness, touching the body of the solenoid to the carb mounting bolt and turn the key on. This helps determine there is power to the solenoid.
Yes that works too!
Thanks for the tip 👍
Great video, my solenoid was dirty, clean it and got movement. The 9 v battery didn't work for me. Put everything together and she started right up. 👍
That was an awesome
Explanation
Easy! Thank you so much!!!
You are my hero. Thanks.
A great video my friend. Congratulations from Venezuela.
Thanks for watching!
Thank you so very much man!! Ery nice and concise video. Also quick question so my solenoid tested bad, can that be a reason of why I don’t get power at all on my zero turn? Thanks in advance
I have the exact same carburetor but my solenoid doesn't have a plunger on the end of it and idk if it got stuck in the carb or not
Good tip thank you,
Hi Great information my mower wont start. . Question does it matter which black and red goes to the connectors on the solenoid
Spot on broski, working on a bush hog with the honda gx690. Now i get why it pumped fuel when i removed the fuel inlet, but stopped pumping when all hoses attached. I made the misdiagnosis first and replaced the fuel pump instead, though it was likely in need to be replaced too by looking at the state of things, but this should make my neighbor happy this weekend when she purrs again...i mean squeals again like the hog it was made to be XD
Cool tip. Thanks
Thanks for watching!
Eliminador Ty you time you videos I like I have cuestión for you I have snapper 0 turn I was gif any way fuel selenoid is single wire where I can conect to battery or to the switch ?
Great video. I'm sure that this is my problem. Thanks.
Thanks for watching!
Nice..cheap tip..thanks
I bought and installed a fuel line shut off cause I was sick of draining the gas tank while I worked on the carb and such. Life made easy...
I did too.... But fuel seems to still be leaking into the bowl... Went to start it this spring and it was full of gasoline. Ugh. Not sure what to do.
I did too.... But fuel seems to still be leaking into the bowl... Went to start it this spring and it was full of gasoline. Ugh. Not sure what to do.
Thanks 👍
After putting carb back in my Kohler 730S 25hp engine, it starts now but have to play with choke to keep it running. Either sounds like a jet or struggles to run. Just learning this and cleaned solenoid but didn' t know how to test it and don' t remember it moving? Am I dealing with a fuel solenoid issue and need to take it back off or coukd this be a choke cable sticking, it feels "sticky" when I move it up and down, but not frozen as a does move lever it' s connected to. Any suggestions will be greatly appreciated. Trying to keep it out of landfill/recycling! Built in 02 but very lightly used, I'm second ower and replaced carb in 2017 with expensive Kohler carb, $200+.
Anyone know what the common failure is when there's no power to the solonoid wire? Perhaps the ignition switch?
sick! how do u test if its in up position when it should be opened and allowing fuel to run as is should
Supplying 12v to the solenoid will engage the magnet and pull it down.
Taking away the 12v will disengage the magnet and the spring should push the plunger back to stop the fuel from going into the main jet.
If you put 12v to the solenoid, but it doesn't move, you need to replace it!
Good concise, clearly presented info. There's another YT presenter who would do well to drop her jibber-jabber and adopt your to-the-point delivery style.
Secondly, is there supposed to be a "click" from the solenoid when we turn the ignition key on ?
I can't seem to hear a click, so I thought maybe it was not working.
If the solenoid fails or jams, can it also jam in the closed, ar retracted, position ?
I drive a 1996 Malaysian Proton Saga, with the Mitsubishi 1,296 cc 4G13 engine, using an Aisan variable venturi type carburetor.
I believe I can see a fuel cut-off, or antidieseling, solenoid at the rear of the carburetor.
Often, on stopping and turning off the ignition key, the engine runs on, or diesels.
So I thought maybe the solenoid had malfunctioned, jamming in the open position, and failing to close the fuel when the ignition key had turned off.
Any idea what the name of the connector is on the solenoid bottom?
Thanks for the vid! I have a solenoid from a John Deere which looks exactly like yours, but with only one wire leaving the part. Is the other one just short wired to ground? And, do you have an idea how to disassemble the solenoid perhaps?
No
need to disassemble, take it from carb bowl, plug the one wire back up if unplugged, touch against mower frame/engine to ground it out and then turn ignition/key to the accessory position and you should receive same results as this test.
Are the threads on those solenoids all the same? I have a Huayi 4X90A and I can't find anything on the type of solenoid it uses. Just asking because I'll probably just wing it and buy something on amazon for 10 bucks and try to rewire it myself.
Thanks for the tip... 9 volt doesn't work (for me anyway). I had to touch it to my 18 volt drill battery to get movement.
Great explanation. Got one with a single pin. Wire it connects to tests good with 12v. How do I bench test a single pin, just any old ground?
Yes the solenoid grounds through the threads on the carb, so touch negative to the solenoid and the positive to the single wire!
@@EliminatorPerformance thanks! No movement so I’m going to assume it’s toast!
I'm getting no power to solenoid I'm assuming because a don't hear it click when i turn ignition key on. i removed the seat safety device so mower wouldn't cut off if i got off lawnmower now it wont start. any ideas?
Be careful expecting a 9v battery to "unlock" a frozen or gunked up solenoid. Mine would just click but not move, until I wired it directly to the batter (12v) and then it broke loose and began working again!!
Yea I have a 12v lithium ion battery pack that I use now, much easier and charges via a USB cable!
My carburetor was giving me problems I finally disconnected the wire from the bottom of the solenoid and the lawnmower ran like brand new I put a fuel shut off valve in the fuel line and turn it off while the motor is running and let it run out of gas it works for me
It's probably seized in the down position then, because when you unplug them they're supposed to stay up. Good thing you ran a shut off valve
Bought a mower that originally had a carb with a fuel shut off solenoid. The guy I got it from I guess got rid of it. I just ordered the right carb with the solenoid and need to know where to run the hot wire from the solenoid to. Any help? Do I just run it to the battery or an ignition wire ?
12v from the key switch!
@@EliminatorPerformance do you need a battery on the mower or does the engine make the needed power to actuate the solenoid when it's running?
Hello sir. I checked it with multimeter continuety. The contineuty works fine. But when i test with batteries, its not working. Could you tell me what could be the problem here?. I dont know what mistake im doing. (Sry im not good with english).
The solenoid clicks (moves) but still dos not allow fuel to flow.
Fuel pump is working, and spraying fuel in carb allows it to run just fine.
It was a sudden stop. And has worked on and off a few times.
Any ideas?
The solenoid on my mower stays down won’t go up at all, should I replace it?
What would fry my fuel shut off valve? My mower stopped on me and I saw smoke coming from the engine. When I looked at it, the shut off solenoid connector had melted and was smoking.
It's possible that the wires shorted? Look for a bare spot on the wires
Genius
does it matter witch way i plug the cable to solenoid? it seems to fit both ways
No, electromagnets are generally non polarized
I am having issues with a Troy-Bilt Pony with Briggs&Stratton engine(17.5HP). The issue is that after like 15-20 mins the engine will shut off automatically and it will not start again until engine cools down. I thought it had to do with the parts in the deck and I went ahead and changed everything including: all belts, deck spindles, blades and pulleys. I found a metal piece that holds the pulley of the PTO worn out a lil bit and the pulley looked unbalanced if I compare with the other one. After changing everything it is still giving me issues so what do you think or recommend? Thanks!
Heat soak on the ignition coil, or a fueling issue. If it dies slowly, it's fuel/carb, if it shuts off quickly, it's spark.
@@EliminatorPerformance when you say if it dies slowly, what exactly do you mean by that? After few mins?
Imagine you pinched a fuel line, your engine would slowly run out of fuel, and start running rough before it died out. Where as if you had a spark issue, let's say a safety switch like a seat switch that grounded the coil, the engine would shut off immediately. This will help you determine what kind of issue you have. Start by running it with the fuel cap loose, if the issue goes away, replace the fuel cap. Sometimes the vents clog and it creates vapor lock in the fuel tank
@@EliminatorPerformance oh ok. No, mine shut off immediately after 15-20 mins of running. Now that you mention safety issue, if I get off of the seat it won’t turn off, could that be it?
@@frankcruzrosado133 when the mower is running, with the brake disengaged, if you get off the seat it would ground the coil and cut the spark. Could be an intermittent problem
Good video thank you can I just use a 12 volt car battery?
Yes that will work too!
@@EliminatorPerformance
Thank you
Mine snaps open with the key on and when it is switched off. Gas drains out into the crankcase. I have the inline shutoff but the battery goes dead so ... ignition switch.
I have the wire pulled out of my solenoid on my vstar, would that be a reason of cause of not starting?
Yes.it controls your fuel.with wire off it stops fuel flow
yes the solenoid is stuck in the closed position without power going to it.
Here's a real pro tip, shut the gas line off, remove anti backfire solenoid, plug it back in and turn the key off and on. Tune in next week for tips on how to fill up your gas tank.
Would this solenoid be causing the air intake to fill with gas?
TO me it sound like it jump time. but its the Carburetor Solenoid that JUST WENT OUT> and it will not start
So the solenoid is working and if I spray starter fluid in through the air intake my mower will fire and then shut back off. I’m getting spark and I’m getting fuel to the carburetor. I don’t know what else to check to get this thing to fire and stay running. Got a fuel issue somewhere but it’s not in the supply line and like I said I took the solenoid out and turned the key and the plunger is moving up and down and the carburetor is filling with fuel. I’m stuck. Any suggestions? In short I’m cranking but will not fire unless I use some starter fluid and then it shuts right back off?
The fuel is going into the bowl, but not through the main jet by the sounds of it!
K never taken one off but I guess I can take the carburetor off and try and clean it out or something, see if there isn’t something blocking the flow of fuel into the jet.
Great video by the way!
Fuel pump isn't pumping enough to keep it running can also be the problem. Mine was at one time.Had a split in the diaphram
jet is blocked
Leave it on the IGN wire, turn key of and on while watching it. Simple. Either works or not.
'm getting no power to solenoid I'm assuming because a don't hear it click when i turn ignition key on. i removed the seat safety device so mower wouldn't cut off if i got off lawnmower now it wont start. any ideas?
Does it matter which prong gets positive? Both wires on my plug are black.
No, an electro magnet is usually non polarized, which means positive or negative can be on either side.
@@EliminatorPerformancethats great to know.
✅❇️✅ best way to do this , take 1/2 wrench unscrew solenoid hold it on your hand and turn the key on you’ll see it move , make sure it’s plugged in to the connector
'm getting no power to solenoid I'm assuming because a don't hear it click when i turn ignition key on. i removed the seat safety device so mower wouldn't cut off if i got off lawnmower now it wont start. any ideas?
hi, my rider stopped and noticed smoke coming from under the carb and engine stopped. when i turned the ignition on the wire on shut off solenoid glowed red and smoked at the connection any idea what to do? thanks anyone who can help.
Replace the fuel shut off solenoid
my bike starts and idles but when given throttle it does not rev up but bogs and sputters could this be the issue of not then someone help me its a wr125 and when i cover a big portion of the air box i feel a big suction and the bike works ok
You have a clogged jet, by putting your hand over the hole, you increase suction and richen the mixture. You need a carb clean and rebuild
@@EliminatorPerformance it’s fuel injected
Replace your fuel filter, it could be starving for fuel. Either way, you're reducing the air thus richening the mixture. So it's running lean right now, not enough fuel. Fuel filter could be clogged up.
Incidentally is it okay not to use the solenoid? I noticed mine was disconnected I have an inline shut off
It's probably cut off then, leaving it open the whole time. Make sure you throttle down before you turn off your keyswitch
@@EliminatorPerformance man thanks a lot I appreciate it. Can I ask you something else? The air cleaner was missing on this unit I bought so it will only run with the choke fully on I ordered a new Honda replacement filter and box do you think that will help it run more rich? I guess my question is with the Box on do you think that will eliminate the need to keep the choke on? Thanks so much
@@t.tocsmaillup8685 well if the engine only runs with the choke on (that creates more suction) the fuel shut off may not have been cut off. You may also have some gunk in the main jet, the added suction sucks more fuel through the main jet
Thanks - good to know .
I just bypass minds useing a switch works fine I just turn on the switch when I’m useing it then turn it off when it’s still running for can close it
Yes you can do without them, just throttle down before shutting engine off
Does it matter which way the positive and negative go???
No, most electric solenoids are non polarized.
@@EliminatorPerformance thank you 😊
Is there any way to bypass that dam thing?
You can cut them off, but you'll have to throttle down your engine when you shut it off or it will most likely back fire! Thanks for watching!
@@EliminatorPerformance Thanks. I just tried to remove it and it snapped off like a dry twig the moment I put a wrench on it. It seems to be seized and full of grime. I just looked up a new one and its $100. I think my old tractors without this thing might be superior. lol
Nice short video that may save an ELIMINATOR $100 for a shut off solenoid by replacing with an in line $6 fuel shut off valve.
Wayne Stefinashen the fuel solenoid is really an anti backfire solenoid and was made for that....it wasn't made to stop leaks...if you put a shut off valve in fuel line it won't do the same as the solenoid....the solenoid immediately blocks the main jet so no fuel will get to the engine...even if you turned off engine and turned off shut off valve immediately you still have a carburetor bowl full of fuel which can still cause engine to backfire....
Macknumber9 you are absolutely correct but sometimes a carburetor rebuild kit is not available, nor is a replacement fuel solenoid so easy peasy cut off the solenoid stem and install a fuel shutoff valve but notify your customer to throttle down before shutting off the engine and NEVER forget to shut of the fuel valve.
Thank you, some more safety crap to go bad. Just got a generator for free. Cleaned the carb, it runs when feeding the throttle body manually. Gonna check the solenoid now
@@macknumber9 But the engine will start and run and do the job it was built to do. The stuck shut off valve doesn't allow the fuel into the carb bowl.Isn't the point to get the mower running.I did the same thing and my mower has been working for at least 2 years without that expensive POS. Just shut it off slowly so it doesn't backfire.It won't hurt it even if it does. I actually cut the tip off the shut off solenoid.It still works fine. Be sure to turn off the inline fuel valve when finished.
How did you know what side was the negative and the positive?
It's doesn't matter, the majority of electromagnets are non polarized, meaning current can flow both ways and it will be powered
@@EliminatorPerformance I thought that principle only applied to 24 V DC
@@EliminatorPerformance I thought that only applied to 24 V AC
@@rayray9777 electromagnets on the PTO clutches are also generally non polarized, with the exception of ones with diodes, which then makes them direct current DC and will have a red and black or red and green wire to identify positive and ground.
Why not just use jumper wires to the mower battery? That seems simple to me.
Agree! And its 12v. The time he spent dwelling on the 9v plug was annoying.
This is something to do if your already cleaning the carb...
There's a wire plug you connect to the solenoid switch witch is activated by turning the key on and off.they go bad sometimes stick.you need to replace it.
Or just pull the solenoid, put a piece of duct tape over the hole, plug it in and turn over the engine. All this drama is a waste of time.
if your battery is dead jumper it to your battery charger.No waiting for it to charge
Mine shoots out when power is applied?
It's opposite then, power is applied to push it out. Weird that they would design it to use power when key is off, but I'm sure it's not much.
@@EliminatorPerformance Yes, I thought it was strange too and possibly defective, but that is apparently how it works. It's a huayi 140. Can't find any information about it. Great channel. Thanks for all these interesting videos.
@@bobjones1620 Try reversing the poles
Another way they can go bad is by leaking. I have a Briggs 25 hr that went bad and I’m lucky I caught the wires were actually glowing with gas dripping. I would eliminate it completely I think it’s a horrible design
So if solenoid is good what else could be wrong with a no start, change spark plugs new battery new switch new fuel pump. $225 at a small engine shop that screwed me it worked one time after they worked on it!! It's like fuel ain't getting through! New gas, we have tried everything.
It's a john deer la145.
Why not just unscrew it from the carb and plug it back in and turn the key to see if it works, That would be easier.
Because sometimes they're single wire solenoids, which means it grounds to the base of it to the carb. So bench testing is easy. If it's dual wire, yes you can unscrew, plug in and test
Also, you won't know if it's the solenoid that's bad or no impulse coming from the plug/wire connection.
Bluetooth fuel shutoff solenoid to stop a thief from stealing my car brought me here. Guess I'll keep researching.
There only 3 things that make your troy built pony not to start 1 No fuel, 2 clog fuel filter, 3 the Carburetor Solenoid. And most likely its the Solenoid. B @ S engines are bad about blow them out When you hear it go? POP! Like a back fire! THAT THE PROBLEM!
I have a 17.5hp Pony that fills the air intake with gas and backfires loud. Is this the problem? I look at the float valve and it seems fine.
The fuel solenoid has absolutely nothing to do with engine flooding
If the needle valve is leaking but the fuel solenoid is seized closed than the engine won't flood with fuel because it can't travel up the main jet.
@@EliminatorPerformance I’m not questioning your integrity you seem like a pretty intelligent person but the fuel solenoid has absolutely zero to do with the engine flooding. it not only floods up through the main jet but it floods through the atmospheric vent
@@EliminatorPerformance ruclips.net/video/OsQ_R0AQG9o/видео.html
@@THEMOWERMEDIC1 You can disagree if you want, but maybe I should have clarified I'm talking about when the engine is off. Let's say you let a mower sit, and the needle valve leaks, the bowl is overfilling with fuel, the fuel has no where else to go other than up the main jet, then down the intake and into the cylinder. That's how many mowers end up with fuel in the crankcase. The fuel shut off solenoid is in the closed position and blocks the main jet. Therefore, fuel cannot travel up the main jet and flood the cylinder and then the crankcase.
@@EliminatorPerformance See that’s exactly what I’m talking about the fuel has other places to go. It fills up the carburetor and out the atmospheric vent. The fuel solenoid is not stopping the carburetor from flooding.
Fuel solenoids do not stop crankcase flooding with fuel !!!
When there's a leaking needle valve, the bowl floods and fuel goes up the main jet into the intake and can sometimes flood a crankcase if the carb is higher than the intake port. With a fuel solenoid, it closes the main jet, which will prevent the engine from flooding. The carb bowl will still flood though, and would run rich as soon as you start it
@@EliminatorPerformance That still doesn’t account for the quart of fuel in the crankcase .
......until it gets hot.....
Pro tip couldn’t see the solenoid in action due to subtitling pro tip it’s called a petcock valve bro tip you don’t really have to explain what a 9 V battery plug is
Guess what. Cut the tip off the solenoid. Won’t have to do any of this.
Pulled it out and no rubber tip on it???? Where did that go? No ignition with spark to a new plug! Sprayed carb cleaner everywhere and reinstalled the bowl and solenoid. STILL no ignition. Sprayed gas into the cylinder and reinstalled the plug.. NOTHING! One back fire and that was it. Its a mystery! Modern technology is driving me NUTS! #$@%@ If it works LEAVE IT THE HELL ALONE!
Video would be a lot better without the unnecessary rock music.