Need Help Please!


Old 01-17-10, 07:26 AM
Thread Starter
Join Date: Jan 2010
Location: United States
Posts: 2
Need Help Please!

We have an old kohler, think it's a 12 HP on a rotory blade golfcourse mower. Got it cheap and now I think I know why. It'll run great for awile, about 2 laps around the yard, but then just suddenly dies and won't restart. My pops says it has no compression but he's never put a gauge in it. also says the muffler was red hot right before it dies. If you let it sit for awile, couple of hrs at least, then the thing will fire right back up just to quit again after it's hot. We did put a new head gasket on it thinking that was the problem, was blown out at the exhaust valve, but didn't help.

I'm hoping that we're not the only ones to have this problem and and can steer me on the road to fixxing it. This mower is hugely impractical for the lawn he has but it is pretty fun trying not to run over moms trees with
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Old 01-17-10, 07:51 AM
hopkinsr2's Avatar
Join Date: Feb 2005
Location: canada
Posts: 1,561
Try it with the gas cap loose.. It almost sound like it's running out of fuel... Check to make sure you have a good flow of fuel to the carb... The engine numbers would help the pros a lot... Roger
Old 01-17-10, 08:47 AM
indypower1's Avatar
Join Date: May 2009
Location: Lake Winnipesaukee, New Hampshire
Posts: 634
Yes gas cap first. It could also be a bad coil. Coil heats up-looses connection- colls down- runs for a little while-heats up- shuts down.
Old 01-18-10, 09:45 AM
Join Date: Dec 2009
Location: Kingsport, TN
Posts: 217
You've got to establish whether the problem is spark or fuel. What I'd do is run the thing until it quits. Remove lead from spark plug and attach it to a spare plug - any old working plug will do. Ground plug to engine and crank engine to see if you have spark at the plug. If you do, it's a fuel issue. If you don't, go back to the coil with a spare wire and redo test.
Old 01-18-10, 08:09 PM
bontai Joe's Avatar
Join Date: Apr 2004
Location: Pennsylvania
Posts: 592
Old Kohlers seldome have much go wrong with them. My guess is the coil or condensor. Have you replaced the points and condensor recently? Or could be the coil. I wouldn't worry about compreesion if it runs good for several minutes and then dies. If compression was bad, it wouldn't run at all.
Old 01-19-10, 04:31 AM
Thread Starter
Join Date: Jan 2010
Location: United States
Posts: 2
will look into your suggestions and let ya know what I come up with. Thanks for your input.
Old 01-19-10, 02:51 PM
Join Date: May 2003
Location: Brookfield Wi.
Posts: 137
I had the same problem every spring. I change the gas and it ran fine.

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