Skip to content
?
Manage My Life

Craftsmen Riding Lawnmower with Kohler 15 hp engine runs fine, stalls after 10 minutes, won't restart until 2 hours later, then cycle repeats

I replaced the carburetor on my riding lawnmower after gas was leaking from it. It started just fine, but then after 10 minutes of using it, it stalled rather quickly with a single backfire. The engine was hotter than normal. I pulled the spark plug out, connected it to the ignition module and held it against a bolt head and it looks like it is not getting a spark. Could it be the ignition module? Or is the engine too hot perhaps because of lack of air flow (my air filter is looking dirty)?

Tags
Lawn Mowers , Lawn & Garden
Sign in to answer a question
11 Answers from these members:
Manage My Life
It can be difficult to deal with your lawn tractor issues. Especially when your lawn most desperately needs a fresh cut. Below I attached a couple links that will help explain your issue. I hope these links are helpful!
by Manage My Life
July 18th, 2011
Answered in 8 minutes
Comment
0 votes
Manage My Life
sounds like your magneto is bad or going bad.if you grounded it and got no spark from it it could be a bad spark plug or needs cleaned or regapped to correct setting. if your air filter is dirty i would suggest replacing it .it will help your motor put out the horsepower and help it run the way it should. you said it runs then dies but will start if you let it set for two hours. it seems it most likely is the ignition module getting hot and not firing the way it suppose to. it may need replaced. hope this gives you a starting point to help resolve your problem until you get a expert opinion good luck
by Manage My Life
July 18th, 2011
Answered in 23 minutes
Comment
0 votes
Manage My Life
Thanks for the replies. I put in a new spark plug and still the same problem. I will replace the air filter. It sounds like the ignition module to me too, but not sure why it would be getting hot.
by Manage My Life
July 18th, 2011
Answered in 1 hours
Comment
0 votes
Mark T
Thank you for your question.

I am sorry you are having a problem with the tractor. If you do not have spark once the engine stalls I suspect the problem is a defective coil. Once you have the blower housing off the top of the engine blow out the cooling fins with compressed air to ensure good airflow to cool the engine. When you are ready to install the new coil, set the air gap at .011.

If you need further assistance, please reply below with more details I will be happy to assist you.

Here is a link to order any parts you need.

Sears Parts Direct

.

If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:

Sears Home Services

.

Thank you for using Manage my life.

Mark T.
by Mark T Earned 1,770 community points in Lawn & Garden
July 19th, 2011
Comment
0 votes
Manage My Life
Thanks Mark T! By "coil" I imagine you are referring to the ignition module (as its called in my manual). Do I need any special tool to set the air gap? Thanks again, Dave
by Manage My Life
July 19th, 2011
Comment
0 votes
Mark T
You are correct. The coil is also known as the ignition module. If you do not have a feeler gauge to set the air gap you can use three sheets of newspaper. The thickness of three sheets of newspaper equal .011. Therefore, no special tools needed to do this repair. Please let me know if you need further assistance.
by Mark T Earned 1,770 community points in Lawn & Garden
July 19th, 2011
Comment
0 votes
Manage My Life
Thanks again!
by Manage My Life
July 20th, 2011
Comment
0 votes
Manage My Life
I installed the new ignition module but the engine won't crank. I don't see how to set the air gap -- the ignition module has screws that align it with very little play. Is that why the engine won't crank? Am I missing something? Thanks for any help.
by Manage My Life
August 2nd, 2011
Comment
0 votes
Mark T
First, loosen the two mounting screws for the ignition coil. Then pull the ignition coil away from the flywheel and tighten them. Now see if the engine will turn over. If the engine will turn over you can set the air gap. Turn the flywheel so the magnet is facing the ignition coil. Then insert the feeler gauge between the flywheel and the ignition coil. While holding the feeler gauge in position loosen the mounting screws. The magnet should pull the coil to it. Once it is tight retighten the screws and removes the feeler gauge turning the flywheel by hand. I hope this is helpful. Please let me know if you need further assistance.
by Mark T Earned 1,770 community points in Lawn & Garden
August 2nd, 2011
Comment
0 votes
Manage My Life
Mark T: I followed your instructions and it worked perfectly. I will test out the lawnmower tonight (have had rain for the past two days) to make sure it works for more than 10 minutes :). Thanks again, Dave
by Manage My Life
August 4th, 2011
Comment
0 votes
Janet VandeVrande
Have a craftsman kohler 18 hp riding mower cranks but want stay running any advice, we changed out ignition coil pack all new, and starter . any advice? runs a bit then stops ..
Thanks
by Janet VandeVrande
May 5th, 2014
Comment
0 votes
Didn't find what you are looking for? Ask a question
Get up to
50
% off
On Lawn Mowers