I want to truly thank you, a thousand times over, for this video. I have a Generac 7550 EXL that I've had for several years, but only had to use a few times. It's been sitting up for quiet awhile, and I forgot to drain the gas, so, old stale gas means problems. Well, it of course wouldn't start, so I drained all the gas, cleaned the carburetor etc, but it wouldn't run properly. It would start, but only run for 10 seconds or so, and then shut off. I cleaned the carburetor again, but no go. I changed the oil and oil filter, but still no go. It would start fine, but after 10 or 15 seconds, it cut off. I finally gave up after several hours of frustration. I got on the internet, and searched for a solution to my problem, and after lots of searches, I found your video. All this was late last night, and I was too tired to go out in the dark to check it, so I waited till today. I was skeptical, after all the things I had already tried, but I disconnected the wires going to the low oil switch, just as you demonstrated, crossed my fingers, and the thing started up, and kept right on running. PROBLEM SOLVED!!! Now all I have to do is get me a new low oil switch. Thank you again Sir, for you have saved me a lot more headaches and money for someone else to fix this thing. You are appreciated.
Tried running, getting ready for winter. Same symptoms. Came across your video, disconnected wire, runs! Now looking for sender. Thanks very much. Saved me much time and fumbling.
THANK YOU! My generator set too long, carb was so bad. I changed it out, then generator would turn on for 8 seconds and quit. Troubleshot the living heck out of it. It didn't make sense that it could be the new carburetor. It did everything right for 8 seconds. I'm so glad for your video. I was about to go down the wrong rabbit hole and change the carb yet again.
Hurricane Laura hit us good here in north Louisiana, power has been off since Thursday. Cleaned the carb several times, new gas, new plug, couldn't figure it out. Your video saved the day.
I really want to thank you. Been fighting this generator for about 2 years now. New carb, new lines, gas filters, etc… finally came across your video and she runs like new now. All this time for a simple oil pressure switch! Thank you!!
Thank you my friend, never would have thought to disconnect the oil sending unit. With this big storm coming, my wife thanks you, my dogs thank you and the cats thank you. (And, by the way, our XL4000 has been a good generator for many years. Hope yours has been as good to you.)
Thank you very much for this video! You solved my problem. I had a clean fuel system and could not understand why mine was shutting down. I suspected oil pressure sensor, but you demonstrated the problem. By the way, I spent 45 minutes on the phone with the Generac support line and they were unable to help. I should have saved the time and gone right to you tube. You are a hero!
Thanks for the video. I’d tried everything else, but couldn’t figure out the problem. I unplugged the wires as you suggested, and it ran. Wished I had found your video earlier. It would have saved me hours of time and heartache. But I’ve learned A LOT through this experience. We’ve ordered the part and I’ll change it out later this week, BEFORE the hurricane hits. Thanks again.
Having the same problem on the Generac 7500EXL generator. It would run for less than 10 seconds then die. Right before it stalled out the low oil alert light would light up for a second. After checking the oil level, I disconnected the two leads coming off the oil pressure sensor and jumped them together to complete the circuit and bypass ground to get it running for hurricane Dorian. With the machine off and no pressure to the oil pressure sensor it reads continuity to ground. A good working sensor would be isolated from the chassis ground while running. Thanks for the helpful video and part number.
WOW!!! That's All I can Say... I thought it was the Shut-Off Valve Filter, As I took it Off, I Broke it,. Replaced the Shut-Off, And Still had the Same Problem. Back to TH-cam I Go, Then, I Found Your Video. Tested as You did, THAT IS WHAT IT IS. Ordering Sensor Now. And The Part # is Much Appreciated. THANKS
Thanks very much for an excellent video. This solved the problem with my 4000 XL generator. By the way, every time I make a video my wife arrives and starts talking in the background. Making a video seems to be like a magnet to women. But they can't keep quiet!
So Glad I found this video, I was about to order a new carburator cause my generator has sat for many years and was given to me. After I watched this I unplugged my sensor and it runs great. Thank you.
Thanks man! I have a 7550xle. Bought it in 2004 and never used. It started right up then stalled out after 6-8 seconds. Watched your video and Bam! That's it! Ordering part now.
I have the Generac 10.000 EXL and had the same problem I thought the carburetor float until I saw this you tube post I did the same disconnected the oil pressure switch and HOME RUN the generator stayed on. I ordered a new oil pressure switch (Generac part 060108) on E BAY for $ 33 from Schwalm Inc from Chino CA. Installed new switch now generator runs like a champ I thought I post this info and also to say thank you to sblg43 for posting this information.
Thank you so much for posting this video. I have a Generac 15000 that was giving me similar problems. I drained the fuel, cleaned the fuel filter, changed the oil, verified oil was filled to correct level, and even changed out the low oil pressure sensor/switch once and thought I had fixed the problem. Sadly, after one successful start up and cool down, the problem returned when I went to start it again. Everything pointed to the low oil pressure sensor/switch being the culprit. So, I begrudgingly bought and installed a second new one and then it ran like a champ. It is possible to get faulty new parts, it seems. I may buy another one just to have a spare. By the way, disconnecting the faulty wires from my defective sensors/switches had no effect. The generator still stalled after about 10 seconds. In any case, it is fixed now. Thanks again for a great video!
I have the 4000exl model, after 10 years sitting, I put in a new battery, had to replace the fuel on/off valve and I took the carb apart just because it sat so long, after all that it did exactly what you found, I disconnected the wires and it stayed running. I found this video while looking for the oil switch part# good job, thanks.
Mike Smith If the fuel valve is plastic, I can see why it would get brittle after so long. I have a similar generator that somebody gave me because the fuel valve broke and he just didn't want the unit taking up space in his garage any longer. A free generator cannot be easily passed up! Now I just have to fix it. Thanks again for watching.
Thanks for the video tip!!! I took a gamble on one of these machines for 70$ from a guy. After further inspection the gas tank had a 1/4 inch of "tar" in the bottom and a good layer of rust in the rest of the inside. After a day of cleaning, replacing fuel lines, new fuel filter,plug, and cleaning carb it done this. Your tip saved the day.
Great video, never would have checked this. I have a craftsman 7.8hp 4200 watt generator that i got for free. Thought this was a carb or fuel delivery issue and i was very wrong. Thanks for the great and to the point video.
I also thought it was a carb issue. I cleaned the carb, no change. Then I replaced the carb, no change. Finally found the problem. Easy fix. Thanks for watching!
They are impatient negative types who don’t have the exact same generator and or don’t see an easy solution to their problem. You can be the sweetest peach in the orchard. There are always folks who don’t like peaches.
I switched out the oil pressure sensing switch, and now it stays running, but will only run with the choke half on. Puts out a lot of thick smoke. Suggestions please? PS. I thought that was hilarious when your wife went by and you made that comment. Love your sense of humor.
Since you got the sensor taken care of, it sounds carburetor related. May need to clean or rebuild or replace the carb. Thanks for watching and thanks for enjoying the humor.
Thank you for posting this video. I have the same the generator that did the same thing and your video saved me a lot of time tinkering with it. Unplugged the sensor and it ran perfectly.
Doing a derive on one of these tomorrow, the guys genny is doing exactly what yours was doing, so I had him order the part, so doing a serive and replacing the oil pressure sensor, thanks for the advice...... I subbed, and rang the bell.
Thanks for the Video Upload! we have a 7550xle that we have only used twice, used for Hurricane Irma, after 3 days it stopped running, this was the problem! THANK YOU AGAIN!!!!!!!
thanks, I searched for a fix to my Generac not keeping good RPM and not starting. The low oil pressure switch was the culprit. I have had this Generac 8K for 4 yrs and nothing but problems. Batteries dont last, I went through 3 or 4 of them, the last one went I noticed (as I always check)(The charger on it eventually went bad so I put a BatteryTender 600 on it with a huge 1000CCA deep cycle battery (with the onboard charger gone I can now put a bigger battery than a small group 26 bat) The winter battery warming blanket burnt itself out in a year. Another time the started didn't work, fixed that by taking it apart an noticed that only 2 of the 4 brushes were rubbing on the commutator (the spring pullback tabs were still pulling back 2 of them) An easy fix once that was noticed. These starting issues I hope are behind me now. My Generac 8K has 47 hours on it. If I had to do it again I would go with a commercial grade one instead of a consumer grade one.
I never knew these smaller engines had a pressurized oil system. I knew some had a low oil level sensor. Now I know to look at that sensor/switch in a different light.
Many thanks, 1 1/2 hours re.oving and cleaning carb wih no diff in engine shutting off after 10 seconds, unplugged low oil switch now good as new.thanks
Excellent video. Mine does the same, and I thought since it ran for a minute or so then quit that it was a carb issue. I will disconnect the switch tomorrow and test.
By a chance, did you look inside the sensor to see what actually was wrong with it? I have used similar sensors (for some other applications) and found that there is unit to unit variation of the tripping point, even though the adjustable version I can match to my needs. However, the second problem comes with some months in use, when the small hole through the threaded plug gets blocked with some crud. Cleaning the hole can solve the issue in that case. Just be careful not to punch a a hole to the membrane inside as well!
If there was ever a video I wanted to make a donation for, and I never have, this would be it. Hurricane Helena has it like the walking dead .... Newborn and wife need generator... thank you very much
And me mine had the same problem i disconnected the bugger and it runs perfectly ,must remember to check the oil level occasianally thogh thanks for that
Thank you for the tip. I had the same problem. Unfortunately it went bad during a power outage and wouldn't stay running. I noticed you also had to keep yours at 1/2 choke as well. Seems to run better there under load.
You might notice that once the engine was warmed up a bit, I shut the choke off. That is how most small engines should operate if they are tuned properly. Hope you got it running again. Thanks for watching.
Do you know how to bypass the Carbon Monoxide detector. It would be in an open space outside but my husband has read it causes problems unless it's just setting directly outside in the yard.
Thanks for pointing me to this video. I have a 17500 watt guardian ultra generac, and it doesn't have a plug for that oil pressure sensor. Can i just disconnect the two wires from the sensor? Or will that break a circuit? Thanks again for help and advice. Edit: I tried with two wired disconnected from oil sensor and connected them together to no avail. Im still gas fouling plugs, even though Ive cleaned carb 3 times this past week. Added a new fuel sensor, and wonder if it could be defective. Is there a way to test the fuel sensor that screws in bottom of float bowl?
if you have something that screws into the bottom of the carburetor, that is probably a fuel shutoff valve. To test that, take it out of the carb but keep the wires connected. Turn the key to the run position and see if it moves. It may be stuck or may need to be replaced.
@@RealManSkills thanks for the reply and help. I took the fuel shut off out and tested to a battery. The plunger pulls in when touched to positive. I just tested as you recommended and it's working. But why am i gas fouling plugs so bad? Gas soaks the air cleaner box! Is there anything else that would cause fuel to foul the spark plugs? After each time it dies, i pull the plugs and they are wet with gas. That air filter box also gets soaked with gas. Is that shut off sensor the only piece that could allow that to happen?
@@SmittybuiltHD It sounds like a carburetor issue. Fouling plugs can be caused by too much fuel. It's possible that the needle and seat aren't sealing properly and allowing fuel to flow past.
I was given a generator w less than 1 hr but hasn't been started in 8 years.i totally cleaned carb inside out w carb cleaner,put new gas,new oil,new plug,fired up 2nd pull,turned down choke after 10 min then bogged down? Only runs when choke is full? Thoughts? Thanks
After cleaning the carb, and then replacing the carb, it was still a problem. Just like everybody else, I scoured the Internet. I found a chat forum that mentioned the oil sensor and decided to try that. It worked, obviously. So I made this video to help others. Thanks for watching!
Had the same issue and the same fix on my 24 yr old 5500xl. Unfortunately the socket cracked while was screwing in the new pressure switch and had to replace the oil filter adapter.
Also, what is the function of the black rubber tube connected to the OHV unit. It looks like it connects to the air filter. Impossible to reattach it to the air filter tube once you remove the air filter case.
That would be a "Breather Tube". The Breathers inside a small engine act as a ventilation system for the combustion gases. They also function to relieve pressure in the crankcase. The breather tube directs the fresh air into the crankcase. If your engine is having performance issues, check the breather assembly, and breather tube.
Mine is a 9hp Vangard with a Briggs & Stratton Engine # 185432. It doesnt have one. It did start once before I started working on it. Drained the oil & filled it back up. Rebuilt the carb. Darn thing still wont even get going..thinking sensor but...
Where can I find the oil pressure sensor housing that mounts to the engine and then you could screw the oil pressure sensor that's what I'm looking for for those two parts can anyone help me let me know where can I buy that
in case of emergency use can it run without the sensor plugged in. just having the same problem and need to run the generator can not wait for part to come in but is ordered.
My chiago electic 5500 generator sting broke so i tried to jump start it from solenoid and it stop cranking doesn't. Seem to engage the starter ... Did i break it or just need new parts
Nice Video. Thanks. Would you happen to know the difference between the 4000xl and the 4000exl? Is the exl electric start? If So Any other differences? Thanks.
Had the same problem with a Coleman generator with a Briggs engine but it would not start due to no spark disconnected the wire to the oil sensor and it fired right up
I was given a generac 4000 watt. My neighbor doesn't want to bother with it. It is leaking gas. There is a dent on the top of metal gas tank. Question? Is it worth to get fixed? I live in fl..so could really use it...esp after last hurricane. Lost alot of food in frig..$$$
Since I fix them myself, I would say yes. But I don't know what somebody else might charge. They are expensive so it still would be cheaper than a new one. Thanks for watching.
One of three or four things. The gas tank bushing, the fuel needle seat, the float bowl gasket, or fuel lines. I had to replace all of these on an old generator that was given to me. Fixed it for less than 15 bucks. Doesn't leak now and runs great. It's worth it if it's just leaking gas.
Mine surges when its not half choked. Any suggestions to fix that? I just put in some Starbrite carb cleaner to see if that helps. Mine has very low hours of use.
I watched your video and noticed toward the end you had to run the generator on partial choke. When you put the machine under load did it still run without bogging down??? Usually a properly running generator shouldn't need any choke if the carburetor is in tune!!!
Yes, you can. You take the chance of seizing the engine if the oil runs low and it doesn't shut down on it's own. So remember to check the oil frequently. Thanks for watching.
I think it's a fuel issue. Mine was doing this too, but now it seems to have gone away. I'm not exactly sure what I might have done to improve it, but here are some things I did: 1) Clean or replace the gas shutoff valve. Maybe there's a better way but here's what I did. Prop up one side of the generator so the outlet of the gas tank is high and dry. Loosen the gas cap. Disconnect the fuel line. Turn the gas-shutoff valve to "on"/open while draining any excess fuel into a container. Gently blow low-pressure compressed air back up through the gas valve. 2) Clean the carburetor. I recommend this how-to guide by Mark Jenkins. th-cam.com/video/0k-iGkPiJ5U/w-d-xo.html When you reattach the carb, make sure the throttle/governor control arm or whatever is in the outer hole in that plate. Finally, put fresh gas in it. Run the generator for a few minutes to warm up with the idle control switch "off". Eventually it should run with little or no choke, and with the idle control switched "on".
So I fixed this issue last year on my 4000xl. But today I started it before an event to test it and it ran fine, got to the event and it wouldn't start. The run stop switch doesn't light up. Any ideas? Carb, spark plug etc less than a year old.
Sounds like an electrical issue. That run/stop switch may be grounded somewhere. Perform a continuity test on that switch. Then check that the wires aren't rubbing somewhere and grounding out the engine. Hope you find it. Thanks for watching.
Install a fuel cut off in line with the fuel line,shut the fuel off when done using,run the carburetor dry,and you won't have any carb problems as it will not gum up when you are not using it. when ready to use it,turn the fuel on,you have a clean carb and off you go...You may not use it all the time,( the generator ),drain the tank and run it till the carb is dry with the fuel shut off,after draining the tank.Have had mine for 15 + years and never had the carb off,just keep it drained AND DRY,NO PROBLEMS DOWN THE LINE...
1. The carburetor on the engine in the video needs to be replaced. I have been through two of them and a new carb solves the problem of the need to run at half choke which is hard on the engine. 2. I have also been through two low oil sensors switches. I removed the two wires to the sensor and taped the ends. No problems since.
So I just bought a used 4000xl. Same problem but a bit linger run. Maybe 60-120 seconds. Disconnected the switch and it ran about 3-4 minutes smoothly than same issue. Ideas?
1:Clean or replace carburetor and fuel lines and filter. 2: After it stalls out, immediately check for spark. If no spark when it's hot, it may be a bad ignition coil. 3: Replace spark plug
yes, it is common. I had it happen to me too on my 4000exl model Generac. Now I need to replace the battery, trying to figure out how to get it out. I read you have to lift up the furl tank then loosen the bolts that hold the battery box. trying to make sure it runs if we loose power from soon to be hurricane Milton which should come on shore they say on Wed 10-9-24
Mine starts and run great but when i add something small like a phone charger or a small dvd player, the generator shuts off like it can't handle any load
My Generac 4000XL was working and is in great condition; it has never given me any problems. The carburetor is clean as a whistle. After running it for 2 days (major power outage in the NE), I went in to change the oil since the oil was more than a year old. Replaced with 5W20 synthetic as recommended (same as always). Otherwise no other changes. However, I just cannot get it to restart. Checked the spark plug (it is sparking), tried a starting fluid as well, but to no avail. Disconnected the oil sensor wires, just in case. RUN switch is on, and I have tried the choke both in full and half positions. Nothing works! The gas is only a few days old and has a stabilizer added (like I have always done). JUST CANNOT START IT. Please let me know if I should be doing anything else. Any help greatly appreciated!
This is a long shot because you did say it was running - If the flywheel key is sheared or slightly sheared, it won't be sparking at the right time and therefore not start. That's just a possible reason.
gracias, el video resulto excelente, me haorraste quisas $200dls, compre la parte en ebay, hice exactamente paso por paso y pues mi generador esta al 100, gracias otra vez
If the leak is coming from the threads, you could try to remove the part and use plumbers tape when you re-insert the part. I don't know off hand what kind of heat the tape will handle though.
I have a Generac power washer that does the same thing. I will try disconnecting the OPS tomorrow and see what happens. I sure hope that's it. It's been driving me crazy. I cleaned the carburetor twice and even removed the gas tank and petcock and cleaned them too.
On the carburetor just under the idle screw there is a screw (idle jet) take that out and clean out the hole in the carburetor and that will fix the surging.
I don't know for sure, but I don't think this sensor has a psi rating. It shuts the engine down when oil is low but these engines don't have a pressurized oil system. No oil filter or oil pump.
My neighbor bought one of these in 2001. He is OCD about maintenance and about changing the oil with Amsoil 10w40 small engine oil. He said he has never had this issue.
![[4 Quick DIY Fixes] Generator only Runs on Choke / Half-choke!](http://i.ytimg.com/vi/fgxgdKl7Mw0/mqdefault.jpg)
![[4 Quick DIY Fixes] Generator only Runs on Choke / Half-choke!](/img/tr.png)
I want to truly thank you, a thousand times over, for this video. I have a Generac 7550 EXL that I've had for several years, but only had to use a few times. It's been sitting up for quiet awhile, and I forgot to drain the gas, so, old stale gas means problems. Well, it of course wouldn't start, so I drained all the gas, cleaned the carburetor etc, but it wouldn't run properly. It would start, but only run for 10 seconds or so, and then shut off. I cleaned the carburetor again, but no go. I changed the oil and oil filter, but still no go. It would start fine, but after 10 or 15 seconds, it cut off. I finally gave up after several hours of frustration. I got on the internet, and searched for a solution to my problem, and after lots of searches, I found your video. All this was late last night, and I was too tired to go out in the dark to check it, so I waited till today. I was skeptical, after all the things I had already tried, but I disconnected the wires going to the low oil switch, just as you demonstrated, crossed my fingers, and the thing started up, and kept right on running. PROBLEM SOLVED!!! Now all I have to do is get me a new low oil switch. Thank you again Sir, for you have saved me a lot more headaches and money for someone else to fix this thing. You are appreciated.
I have been there many times myself with all kinds of small engine troubles. I am happy that this solved your problem. Thanks for watching.
Tried running, getting ready for winter. Same symptoms. Came across your video, disconnected wire, runs! Now looking for sender. Thanks very much. Saved me much time and fumbling.
Glad you found the problem. Thanks for watching!
THANK YOU! My generator set too long, carb was so bad. I changed it out, then generator would turn on for 8 seconds and quit. Troubleshot the living heck out of it. It didn't make sense that it could be the new carburetor. It did everything right for 8 seconds. I'm so glad for your video. I was about to go down the wrong rabbit hole and change the carb yet again.
That is exactly what happened with me! Thanks for watching!
Hurricane Laura hit us good here in north Louisiana, power has been off since Thursday. Cleaned the carb several times, new gas, new plug, couldn't figure it out. Your video saved the day.
Happy to help! Praying for your safety!
I really want to thank you. Been fighting this generator for about 2 years now. New carb, new lines, gas filters, etc… finally came across your video and she runs like new now. All this time for a simple oil pressure switch! Thank you!!
Me too! Cleaned the carb, replaced the carb! And then I find the real problem! Happy to help! Thanks for watching.
Thank you my friend, never would have thought to disconnect the oil sending unit. With this big storm coming, my wife thanks you, my dogs thank you and the cats thank you. (And, by the way, our XL4000 has been a good generator for many years. Hope yours has been as good to you.)
+Ron L. Happy to help! Hunker down for the coming storm! Thanks for watching!
Thank you very much for this video! You solved my problem. I had a clean fuel system and could not understand why mine was shutting down. I suspected oil pressure sensor, but you demonstrated the problem. By the way, I spent 45 minutes on the phone with the Generac support line and they were unable to help. I should have saved the time and gone right to you tube. You are a hero!
Happy to help! Thanks for watching!
Customer service is dead nowadays.
Thanks! I was 90 seconds from rolling this thing down a cliff!!!
Happy to help! Thanks for watching!
lol, me too. I just troubleshot it his way, and oil switch is bad. I was ready to put it at the end of the driveway for someone to take away.
I'm getting ready a hurricane, I went outside tried this and it worked like a charm. You're a Godsend!!!! Thanks!!!!!!!
Hope the hurricane misses you. Happy to help!
Thanks for the video. I’d tried everything else, but couldn’t figure out the problem. I unplugged the wires as you suggested, and it ran. Wished I had found your video earlier. It would have saved me hours of time and heartache. But I’ve learned A LOT through this experience. We’ve ordered the part and I’ll change it out later this week, BEFORE the hurricane hits. Thanks again.
You are not alone. I spent hours on this machine before I figured it out as well. Thanks for watching!
Having the same problem on the Generac 7500EXL generator. It would run for less than 10 seconds then die. Right before it stalled out the low oil alert light would light up for a second. After checking the oil level, I disconnected the two leads coming off the oil pressure sensor and jumped them together to complete the circuit and bypass ground to get it running for hurricane Dorian. With the machine off and no pressure to the oil pressure sensor it reads continuity to ground. A good working sensor would be isolated from the chassis ground while running. Thanks for the helpful video and part number.
Thanks for watching!
I disconnected that harness and mjbe still wont start
WOW!!! That's All I can Say... I thought it was the Shut-Off Valve Filter, As I took it Off, I Broke it,. Replaced the Shut-Off, And Still had the Same Problem. Back to TH-cam I Go, Then, I Found Your Video. Tested as You did, THAT IS WHAT IT IS. Ordering Sensor Now. And The Part # is Much Appreciated. THANKS
Happy to help! Thanks for watching!
@@RealManSkills You are Welcome. Saved the Day.
Thanks very much for an excellent video. This solved the problem with my 4000 XL generator. By the way, every time I make a video my wife arrives and starts talking in the background. Making a video seems to be like a magnet to women. But they can't keep quiet!
Thanks for watching. Now before I begin recording I have to let my wife know what's going on.
So Glad I found this video, I was about to order a new carburator cause my generator has sat for many years and was given to me. After I watched this I unplugged my sensor and it runs great. Thank you.
And thank you! Happy to help!
Thanks man! I have a 7550xle. Bought it in 2004 and never used. It started right up then stalled out after 6-8 seconds. Watched your video and Bam! That's it! Ordering part now.
Thanks for watching! Happy to help!
I just mine unplugged. It's been running fine for the past 6 years now. No problem. Thanks for sharing...
Thanks for watching!
I have the Generac 10.000 EXL and had the same problem I thought the carburetor float until I saw this you tube post I did the same disconnected the oil pressure switch and HOME RUN the generator stayed on. I ordered a new oil pressure switch (Generac part 060108) on E BAY for $ 33 from Schwalm Inc from Chino CA. Installed new switch now generator runs like a champ I thought I post this info and also to say thank you to sblg43 for posting this information.
+shindawg550 Thanks for watching. I am happy to have helped.
Yep, that did the trick. I unplugged that sucker and she runs like a fine tuned sewing machine. Thank you very much for that information.
Thank you so much for posting this video. I have a Generac 15000 that was giving me similar problems. I drained the fuel, cleaned the fuel filter, changed the oil, verified oil was filled to correct level, and even changed out the low oil pressure sensor/switch once and thought I had fixed the problem. Sadly, after one successful start up and cool down, the problem returned when I went to start it again. Everything pointed to the low oil pressure sensor/switch being the culprit. So, I begrudgingly bought and installed a second new one and then it ran like a champ. It is possible to get faulty new parts, it seems. I may buy another one just to have a spare.
By the way, disconnecting the faulty wires from my defective sensors/switches had no effect. The generator still stalled after about 10 seconds.
In any case, it is fixed now. Thanks again for a great video!
Thanks for watching!
I have the 4000exl model, after 10 years sitting, I put in a new battery, had to replace the fuel on/off valve and I took the carb apart just because it sat so long, after all that it did exactly what you found, I disconnected the wires and it stayed running. I found this video while looking for the oil switch part# good job, thanks.
Thank you for watching! Happy to help!
The fuel valve on these broke like a twig.
Mike Smith If the fuel valve is plastic, I can see why it would get brittle after so long. I have a similar generator that somebody gave me because the fuel valve broke and he just didn't want the unit taking up space in his garage any longer. A free generator cannot be easily passed up! Now I just have to fix it.
Thanks again for watching.
Thanks for the video tip!!! I took a gamble on one of these machines for 70$ from a guy. After further inspection the gas tank had a 1/4 inch of "tar" in the bottom and a good layer of rust in the rest of the inside. After a day of cleaning, replacing fuel lines, new fuel filter,plug, and cleaning carb it done this. Your tip saved the day.
Sounds like it was well worth it. Thanks for watching.
Just tried this...that was the problem. Generator running totally normal now. Friggin rights you did it buddy.
Happy to help! Thanks for watching! If you're in Florida, hope you're safe!
Great video. This was exactly my problem and your solution was spot-on. Thanks!
Happy to help. Thanks for watching!
This just answered my question on, "WTF is wrong with my generator!!!??" Thanks much for the video!!!
Thanks for watching. Happy to know that you got it running again.
Great video, never would have checked this. I have a craftsman 7.8hp 4200 watt generator that i got for free. Thought this was a carb or fuel delivery issue and i was very wrong. Thanks for the great and to the point video.
I also thought it was a carb issue. I cleaned the carb, no change. Then I replaced the carb, no change. Finally found the problem. Easy fix. Thanks for watching!
Who are the 31 people that gave this video a thumbs down?! This video is awesome! Thanks fine sir (and bride haha). This is a fantastic video!
Thanks!
They are impatient negative types who don’t have the exact same generator and or don’t see an easy solution to their problem. You can be the sweetest peach in the orchard. There are always folks who don’t like peaches.
Thanks so much! I have a champion with oil pressure switch and had the same issue lol. You saved our family camping trip!
Happy to help! Thanks for watching and have a great trip!
The online owner's manual doesn't even tell you the type of oil to use or the capacity! Ridiculous. Great tip, I'll keep this in mind.
Thanks for watching!
I switched out the oil pressure sensing switch, and now it stays running, but will only run with the choke half on. Puts out a lot of thick smoke. Suggestions please? PS. I thought that was hilarious when your wife went by and you made that comment. Love your sense of humor.
Since you got the sensor taken care of, it sounds carburetor related. May need to clean or rebuild or replace the carb. Thanks for watching and thanks for enjoying the humor.
If you have a two stroke motor and your gas to fuel ratio is not correct that could be your problem. Just a suggestion my friend.
@@donleggett5973 thanks Don
Thanks for the video! Unplugged the wires and it runs great. Saved me some money by not having to get someone to repair for me
Thank you for posting this video. I have the same the generator that did the same thing and your video saved me a lot of time tinkering with it. Unplugged the sensor and it ran perfectly.
Thanks for watching! Happy to help!
Great video, gets to the point. With this hurricane on the way I am sure you helped many. Thank you.
Glad it helped
Doing a derive on one of these tomorrow, the guys genny is doing exactly what yours was doing, so I had him order the part, so doing a serive and replacing the oil pressure sensor, thanks for the advice...... I subbed, and rang the bell.
Thanks! Much appreciated!
Thanks for the Video Upload! we have a 7550xle that we have only used twice, used for Hurricane Irma, after 3 days it stopped running, this was the problem! THANK YOU AGAIN!!!!!!!
Happy to help! Thanks for watching! Glad you're safe!
Great tip. Solved same issue on my q-55g after I disconnected wire.
Thanks for watching!
thanks, I searched for a fix to my Generac not keeping good RPM and not starting. The low oil pressure switch was the culprit. I have had this Generac 8K for 4 yrs and nothing but problems. Batteries dont last, I went through 3 or 4 of them, the last one went I noticed (as I always check)(The charger on it eventually went bad so I put a BatteryTender 600 on it with a huge 1000CCA deep cycle battery (with the onboard charger gone I can now put a bigger battery than a small group 26 bat) The winter battery warming blanket burnt itself out in a year. Another time the started didn't work, fixed that by taking it apart an noticed that only 2 of the 4 brushes were rubbing on the commutator (the spring pullback tabs were still pulling back 2 of them) An easy fix once that was noticed. These starting issues I hope are behind me now. My Generac 8K has 47 hours on it. If I had to do it again I would go with a commercial grade one instead of a consumer grade one.
I never knew these smaller engines had a pressurized oil system. I knew some had a low oil level sensor. Now I know to look at that sensor/switch in a different light.
Most of the small engines that I work on do NOT have a pressurized oil system. This one is unique in that regard. Thanks for watching.
Many thanks, 1 1/2 hours re.oving and cleaning carb wih no diff in engine shutting off after 10 seconds, unplugged low oil switch now good as new.thanks
Thanks for watching!
Why doesn't the RED low pressure light come one with the switch is disabled??
Excellent video. Mine does the same, and I thought since it ran for a minute or so then quit that it was a carb issue. I will disconnect the switch tomorrow and test.
Hope that is all it takes! Thanks for watching!
Very helpful. Much appreciation
Great job ! worked like a charm !! thanks
+Guy Arcand Thanks for watching!
what is the name of that part where you screw the oil pressure sensor that's what I need that part
I replaced the "oil pressure switch" - it was a "Generac 099236".
By a chance, did you look inside the sensor to see what actually was wrong with it? I have used similar sensors (for some other applications) and found that there is unit to unit variation of the tripping point, even though the adjustable version I can match to my needs. However, the second problem comes with some months in use, when the small hole through the threaded plug gets blocked with some crud. Cleaning the hole can solve the issue in that case. Just be careful not to punch a a hole to the membrane inside as well!
Never even thought of looking at the bad sensor. Thanks for the info.
Perfect,I have bought a 6500 XLT generator, I hope I don't have problems with it!!
Well, if you do, you will know how to check the oil sensor. Thanks for watching.
I need the oli pressure sensor housing
If there was ever a video I wanted to make a donation for, and I never have, this would be it. Hurricane Helena has it like the walking dead .... Newborn and wife need generator... thank you very much
Happy to help! Praying for you! Be safe!
Thanks a lot. Thats exactly what was wrong with mine. I haven't replaced the sensor yet but it runs like a top. Dave
Happy to help!
Thank you, Sir .................... just saved me a ton of $$$$$!!!
And me mine had the same problem i disconnected the bugger and it runs perfectly ,must remember to check the oil level occasianally thogh thanks for that
Praise Jeebus! Just borrowed from a buddy and outsmarted myself by plugging it back in. Undid it and GTG
Thanks for watching!
Seems to be a common issue with this model. Assuming the replacement part has some sort of improvement?
Thanks for getting to the point sir! Your the best! Like the video guys!!!💯
Thanks for watching!
Thank you for the tip. I had the same problem. Unfortunately it went bad during a power outage and wouldn't stay running. I noticed you also had to keep yours at 1/2 choke as well. Seems to run better there under load.
You might notice that once the engine was warmed up a bit, I shut the choke off. That is how most small engines should operate if they are tuned properly. Hope you got it running again. Thanks for watching.
Co2 sensor on Honda generator needs replacing or by-pass any ideas?
thanks! it finally stayed started. i ordered new sending unit, and then will see if it will start without starting spray!
Thanks for watching!
Do you know how to bypass the Carbon Monoxide detector. It would be in an open space outside but my husband has read it causes problems unless it's just setting directly outside in the yard.
Sorry no. That generator wasn't mine and it was a few years ago now.
Thanks for pointing me to this video. I have a 17500 watt guardian ultra generac, and it doesn't have a plug for that oil pressure sensor. Can i just disconnect the two wires from the sensor? Or will that break a circuit?
Thanks again for help and advice.
Edit:
I tried with two wired disconnected from oil sensor and connected them together to no avail.
Im still gas fouling plugs, even though Ive cleaned carb 3 times this past week. Added a new fuel sensor, and wonder if it could be defective. Is there a way to test the fuel sensor that screws in bottom of float bowl?
if you have something that screws into the bottom of the carburetor, that is probably a fuel shutoff valve. To test that, take it out of the carb but keep the wires connected. Turn the key to the run position and see if it moves. It may be stuck or may need to be replaced.
@@RealManSkills thanks for the reply and help. I took the fuel shut off out and tested to a battery. The plunger pulls in when touched to positive. I just tested as you recommended and it's working. But why am i gas fouling plugs so bad? Gas soaks the air cleaner box!
Is there anything else that would cause fuel to foul the spark plugs? After each time it dies, i pull the plugs and they are wet with gas. That air filter box also gets soaked with gas. Is that shut off sensor the only piece that could allow that to happen?
@@SmittybuiltHD It sounds like a carburetor issue. Fouling plugs can be caused by too much fuel. It's possible that the needle and seat aren't sealing properly and allowing fuel to flow past.
And I was about to rip apart the carb!....I have the similar generator but its a 4000 EXL, any idea if its the same part # ?
Sorry, I don't know. You would have to search the interweb with the model of your engine or generator.
I was given a generator w less than 1 hr but hasn't been started in 8 years.i totally cleaned carb inside out w carb cleaner,put new gas,new oil,new plug,fired up 2nd pull,turned down choke after 10 min then bogged down? Only runs when choke is full? Thoughts? Thanks
Carb adjustment?
Thanks ! I wonder how did you figure the problem out initially
After cleaning the carb, and then replacing the carb, it was still a problem. Just like everybody else, I scoured the Internet. I found a chat forum that mentioned the oil sensor and decided to try that. It worked, obviously. So I made this video to help others. Thanks for watching!
Had the same issue and the same fix on my 24 yr old 5500xl. Unfortunately the socket cracked while was screwing in the new pressure switch and had to replace the oil filter adapter.
Also, what is the function of the black rubber tube connected to the OHV unit. It looks like it connects to the air filter. Impossible to reattach it to the air filter tube once you remove the air filter case.
That would be a "Breather Tube". The Breathers inside a small engine act as a ventilation system for the combustion gases. They also function to relieve pressure in the crankcase. The breather tube directs the fresh air into the crankcase. If your engine is having performance issues, check the breather assembly, and breather tube.
That's the way to do it, process of elimination, to find the problem. Good tip to check the sending unit.
Thanks for watching! I have to admit, the first time I dealt with this situation, it was a head scratcher.
Thanks, you saved me a lot of headache and probably some $$$ too!
You are welcome! Thanks for watching.
Mine is a 9hp Vangard with a Briggs & Stratton Engine # 185432. It doesnt have one. It did start once before I started working on it. Drained the oil & filled it back up. Rebuilt the carb. Darn thing still wont even get going..thinking sensor but...
Where can I find the oil pressure sensor housing that mounts to the engine and then you could screw the oil pressure sensor that's what I'm looking for for those two parts can anyone help me let me know where can I buy that
this worked for my subaru powerstroke generator. thanks a million
Happy to help! Thanks for watching!
in case of emergency use can it run without the sensor plugged in. just having the same problem and need to run the generator can not wait for part to come in but is ordered.
Yes. Just make sure to keep an eye on the oil level. Thanks for watching.
Thanks. I'm in the same boat. As a precaution, i changed my oil before running it with the sensor disconnected to be sure it was clean and full.
My chiago electic 5500 generator sting broke so i tried to jump start it from solenoid and it stop cranking doesn't. Seem to engage the starter ... Did i break it or just need new parts
Please help its snowing in i live in a campet
Camper
Nice Video. Thanks. Would you happen to know the difference between the 4000xl and the 4000exl? Is the exl electric start? If So Any other differences? Thanks.
Thanks for watching. Sorry, I don't know the difference. I don't actually see very many generators in my shop.
@@RealManSkills Thanks for getting back to me.
@@RealManSkills EXL is extended life. I'm not sure what XL is
What do you if the 240 plug stop working and the reset was pushed in.
Took CO sensor out and now it runs great again but doesnt produce power? Any ideas? Thanks
I don't know much about the generator itself. Just the engines. Sorry
Had the same problem with a Coleman generator with a Briggs engine but it would not start due to no spark disconnected the wire to the oil sensor and it fired right up
I was given a generac 4000 watt. My neighbor doesn't want to bother with it. It is leaking gas. There is a dent on the top of metal gas tank. Question? Is it worth to get fixed? I live in fl..so could really use it...esp after last hurricane. Lost alot of food in frig..$$$
Since I fix them myself, I would say yes. But I don't know what somebody else might charge. They are expensive so it still would be cheaper than a new one. Thanks for watching.
One of three or four things. The gas tank bushing, the fuel needle seat, the float bowl gasket, or fuel lines. I had to replace all of these on an old generator that was given to me. Fixed it for less than 15 bucks. Doesn't leak now and runs great. It's worth it if it's just leaking gas.
Mine surges when its not half choked. Any suggestions to fix that? I just put in some Starbrite carb cleaner to see if that helps. Mine has very low hours of use.
Thank for posing I have found this problem can also be caused by the poor float adjustment
I watched your video and noticed toward the end you had to run the generator on partial choke. When you put the machine under load did it still run without bogging down??? Usually a properly running generator shouldn't need any choke if the carburetor is in tune!!!
I just forgot to turn the choke off. Once it's warm, it runs great with the choke fully off. Thanks for watching.
Can you run it with the switch unplugged?
Yes, you can. You take the chance of seizing the engine if the oil runs low and it doesn't shut down on it's own. So remember to check the oil frequently. Thanks for watching.
Does the idle control circuit not work either?
I think it's a fuel issue. Mine was doing this too, but now it seems to have gone away. I'm not exactly sure what I might have done to improve it, but here are some things I did:
1) Clean or replace the gas shutoff valve. Maybe there's a better way but here's what I did. Prop up one side of the generator so the outlet of the gas tank is high and dry. Loosen the gas cap. Disconnect the fuel line. Turn the gas-shutoff valve to "on"/open while draining any excess fuel into a container. Gently blow low-pressure compressed air back up through the gas valve.
2) Clean the carburetor. I recommend this how-to guide by Mark Jenkins. th-cam.com/video/0k-iGkPiJ5U/w-d-xo.html
When you reattach the carb, make sure the throttle/governor control arm or whatever is in the outer hole in that plate.
Finally, put fresh gas in it. Run the generator for a few minutes to warm up with the idle control switch "off". Eventually it should run with little or no choke, and with the idle control switched "on".
Thanks for that video.
Did what you did to yours and mine is working great. Thanks
Thanks for watching! Happy to help!
So I fixed this issue last year on my 4000xl. But today I started it before an event to test it and it ran fine, got to the event and it wouldn't start. The run stop switch doesn't light up. Any ideas? Carb, spark plug etc less than a year old.
Sounds like an electrical issue. That run/stop switch may be grounded somewhere. Perform a continuity test on that switch. Then check that the wires aren't rubbing somewhere and grounding out the engine. Hope you find it. Thanks for watching.
Thank-You Well done video. Solves a frustrating problem.
I was frustrated too until I figured it out. That's why I shared. Thanks for watching!
Install a fuel cut off in line with the fuel line,shut the fuel off when done using,run the carburetor dry,and you won't have any carb problems as it will not gum up when you are not using it. when ready to use it,turn the fuel on,you have a clean carb and off you go...You may not use it all the time,( the generator ),drain the tank and run it till the carb is dry with the fuel shut off,after draining the tank.Have had mine for 15 + years and never had the carb off,just keep it drained AND DRY,NO PROBLEMS DOWN THE LINE...
Do you drain the fuel out of the carb bowl too? If you don't, your carb can still have old gas in it and not run months later. happened to me.
1. The carburetor on the engine in the video needs to be replaced. I have been through two of them and a new carb solves the problem of the need to run at half choke which is hard on the engine.
2. I have also been through two low oil sensors switches. I removed the two wires to the sensor and taped the ends. No problems since.
The carburetor in the video is new and it did not fix the problem. Thanks for watching.
So I just bought a used 4000xl. Same problem but a bit linger run. Maybe 60-120 seconds. Disconnected the switch and it ran about 3-4 minutes smoothly than same issue. Ideas?
1:Clean or replace carburetor and fuel lines and filter. 2: After it stalls out, immediately check for spark. If no spark when it's hot, it may be a bad ignition coil. 3: Replace spark plug
Is it oil pressure or oil level shut off
This would be an "oil pressure" switch. I believe it's 8psi. Thanks for watching.
yes, it is common. I had it happen to me too on my 4000exl model Generac. Now I need to replace the battery, trying to figure out how to get it out. I read you have to lift up the furl tank then loosen the bolts that hold the battery box. trying to make sure it runs if we loose power from soon to be hurricane Milton which should come on shore they say on Wed 10-9-24
Thanks for watching. Be safe!
Mine starts and run great but when i add something small like a phone charger or a small dvd player, the generator shuts off like it can't handle any load
I hope that you figure it out.
This is my problem! Thank you!
Happy to help!
Worked like a champ! Thank you.
Thanks for watching!
Very good video,,,,Thanks alot!!!!
Thanks for watching!
Thanks. This fix worked on my 7500 eco.
Happy to help! Thanks for watching.
My Generac 4000XL was working and is in great condition; it has never given me any problems. The carburetor is clean as a whistle.
After running it for 2 days (major power outage in the NE), I went in to change the oil since the oil was more than a year old. Replaced with 5W20 synthetic as recommended (same as always). Otherwise no other changes.
However, I just cannot get it to restart. Checked the spark plug (it is sparking), tried a starting fluid as well, but to no avail. Disconnected the oil sensor wires, just in case. RUN switch is on, and I have tried the choke both in full and half positions. Nothing works! The gas is only a few days old and has a stabilizer added (like I have always done).
JUST CANNOT START IT. Please let me know if I should be doing anything else. Any help greatly appreciated!
This is a long shot because you did say it was running - If the flywheel key is sheared or slightly sheared, it won't be sparking at the right time and therefore not start. That's just a possible reason.
Does it start with a shot of starting fluid?
No it does not start with even a shot of starter fluid. I am totally flummoxed!
Also, where would the flywheel key be located?
Thx
I do see a spark when I pull the cord and ground the outside of the spark plug.
@@shajifarooq8752 You will have to remove the flywheel to check the key. It's a pain.
gracias, el video resulto excelente, me haorraste quisas $200dls, compre la parte en ebay, hice exactamente paso por paso y pues mi generador esta al 100, gracias otra vez
Gracias por ver.
Hey there buddy, I was wondering I was needing some help on troubleshooting my generator
I have the same generator and is leaking oil from the oil pressure sensor. is there a way to stop the leak without changing the part?
If the leak is coming from the threads, you could try to remove the part and use plumbers tape when you re-insert the part. I don't know off hand what kind of heat the tape will handle though.
I have a Generac power washer that does the same thing. I will try disconnecting the OPS tomorrow and see what happens. I sure hope that's it. It's been driving me crazy. I cleaned the carburetor twice and even removed the gas tank and petcock and cleaned them too.
That's what I did too. I even replaced the carburetor. But ultimately, I found the real problem. Thanks for watching.
On the carburetor just under the idle screw there is a screw (idle jet) take that out and clean out the hole in the carburetor and that will fix the surging.
that screw is set in pretty tight, stiped out the Philips head trying to remove the screw.
Great Video
Does anyone know the PSI for this oil sensor ?????
MY GENERAC MODEL # 06145 TRYING TO LOCATE A REPLACEMENT SENSOR
I don't know for sure, but I don't think this sensor has a psi rating. It shuts the engine down when oil is low but these engines don't have a pressurized oil system. No oil filter or oil pump.
My neighbor bought one of these in 2001. He is OCD about maintenance and about changing the oil with Amsoil 10w40 small engine oil. He said he has never had this issue.
Well, if he ever does, he'll know where to look. Thanks for watching.