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Sears lawn tractor with automatic tramission, 3 years old, govenor is stuck open. Mower ran fine one day and thed next day when it was started it ran wide open

It is a 20 hp, electric start, Kohler engine Model No 917.28734

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Lawn Tractors , Wall Ovens , Lawn Mowers
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9 Answers from these members:
Manage My Life
I can't find a photo or drawing of this spring in place anywhere. It connects the governor arm to the carb throttle, the same as the linkage does. The spring actually slides over the linkage and then connects in the same holes or small holes just beside the linkage holes.

I also attached a link to the service manual for your engine so you can use it as a reference.
by Manage My Life
April 12th, 2011
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Manage My Life
Can you send me a picture of how this spring is connected, my manual does not really show how it goes on. Once again my model number is 917.287340, it is under engine controls 9-20-14, It is called spring linkage, #17 in that illustration. The part number is 20 089 10-S. In my manual it floats the spring out in space and does show where it connect to. Thank you so much for your help.
by Manage My Life
April 12th, 2011
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Manage My Life
That could very well cause this problem if the spring is missing. I usually assume that the linkages are in normal condition unless someone mentions it because it is a very rare occasion for there to be an issue with the linkages like that.
by Manage My Life
April 9th, 2011
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Manage My Life
I did notice that on my tractor, model number 917.287340 under engine controls 9-20-14 that my spring linkage is missing Item number 17, p/n 20 089 10-S in my sears part book.
by Manage My Life
April 8th, 2011
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Manage My Life
I'm afraid that's going to mean that the governor gear has spun off inside the engine. The engine will have to be opened up in order to make the repair. I wish it were better news, but I'm afraid it's not. The good news is that it can be fixed.
by Manage My Life
March 23rd, 2011
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Manage My Life
Wade B, I took the bracket of the engine and was able to start my engine. It was running wide open and where the governor comes out of the engine I was able to slow the engine down by turning the arm and let it idle at a normal speed.
by Manage My Life
March 23rd, 2011
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Manage My Life
It sounds like the governor gear on the inside of the engine has spun off. There are other things that can cause this situation to occur but they would not be very likely since you used the machine once and everything was normal and then the next time you used it the problem was there.

If you grab the governor arm and can make the engine speed come down by moving it, the problem will be the governor gear inside the engine. If you cannot control the engine speed with the governor arm there is a problem with the linkage or with the butterfly in the carburetor. Both of those are not very likely but it's certainly worth checking.

If you determine that the problem is within the engine I recommend you have a qualified technician take care of the problem for you. Any time you open the engine up for something it is a major repair. You can schedule a technician to come to your home here:

Sears Home Services

.

Thank you for using Manage My Life!
by Manage My Life
March 23rd, 2011
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Kevin Bowley
Hi, Ensure that you do not run the engine until the problem is resolved. Over revving will cause catastrophic engine failure. That said, the governor assembly is vary sensitive and should only be serviced by a certified small engine mechanic or some that has extensive experience with small engines. There are several possibilities that could cause your issue; the governor spring has broken or fallen off, the linkage is dirty and sticking, the throttle plate/shaft is worn and stuck open, the internal governor gear has failed. Inspect the linkage to ensure it moves freely and the throttle shaft on the carburetor moves freely. Ensure the spring is in place the controls the throttle rod the goes from the throttle control linkage on the engine and the throttle on the carburetor. move the throttle control to full speed then manually close the throttle on the carburetor, you should feel a slight resistance when moving the throttle plate on the carburetor back to idle. Next move the throttle control to full slow and repeat, the throttle should be in the idle position on the carburetor. Lubricate all linkages with light weight oil. If all seems in order and you have lubricated the linkages, re-start the engine being prepared to immediately shut it off if it over revs. If it does not operate properly after your inspection, corrections and lubrication, I recommend having a Sears technician service the tractor. You do not want to destroy your engine, better safe than sorry.
Thanks for using Manage My Life and keep us updated.
Kevin.
by Kevin Bowley Earned 14 community points in Lawn Mowers
March 22nd, 2011
Answered in 9 hours
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Manage My Life
Lawn Tractor are an awesome tool to have. while you are waiting on an expert to answer your question, a suggestion I have is to visit Sears Home Services website to set service with a Sears technician. I have attached the link below. Hope this helps!
by Manage My Life
March 21st, 2011
Answered in 5 minutes
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