kohler 25hp v twin ch730 series shuts down after mowing for 1/2 hr. r

[Dupa]

When my tractor cools down it runs fine until hot again? plenty of power and gas ? help

chris

 

[Dave M7040]

When my tractor cools down it runs fine until hot again? plenty of power and gas ? help

chris

Chris

Suggest you go to this Kohler engine web site and find the manual for your specific engine.

I cannot find a CH series engine but perhaps it is known by a different name like Courage........

Engine Manuals | Kohler Engines

I have a 25 HP vertical shaft Kohler in a Toro zero turn. The Kohler manual suggests a diode problem.

These diodes are becoming the norm in most farm machinery and garden machinery as more and more electronic components are being used.
When a starter relay or solenoid is energized, a strong magnetic field builds up around the small wire winding's. These are the winding's which power the relay or solenoid.
When you release the key from start, the magnetic field collapses suddenly and in doing so can generate voltage spikes of hundreds of volts.

This phenomenon is called flyback.

Diodes are now used to bleed off the voltage spikes.

Depending upon the age of your machine it may incorporate an electronic "operator presence" controller. It receives signals from many safety switches and makes decisions about what the tractor can do or if it must be stopped.


This is feedback from the owner of a JD X300:

OK- Got the new part today & installed it, Took all of 5 minutes. Cut for about 15 minutes then the moment of truth. Pulled the mower deck engage & viola- She works again - tried it 3 more times off & on just to verify. All Good. Just an fyi the old part number was AM135490 & new replacement is AM141075. When I pulled the old ecu I could actually see 3 bubbles in the protective rubber covering where it looks like a resistor or whatever underneath had melted or at least gotten way too hot. The new one was perfectly flat. I am gonna try & tear it down to see what lies underneath soon. Hope this may help someone else on down the road. Again thanks to all who posted especially, DaveM7040 for all the time he spent helping me troubleshoot the problem. Happy holiday to all. Bill

Dave M7040

 

[tomplum]

A Command horizontal may have different ignition systems from one to the next. The spec number would help identify what you have. It could also be something unrelated. Describe what happens when it shuts down and what if anything you can do to change it IE it will stumble along another minute w/ the choke out. What tractor is this on?

 

[Stimw]

You don't say how old/hours?
Here is what happened to a 22 hp Kohler when the fins clogged up and it was overheating.
Exhaust valve stuck open and it ate it.
It had 3200 hours on it!

 

[MossRoad]

vapor lock on the fuel system.

Install a clear fuel filter just before the carb (about $3.00) and the next time it happens, look in the filter to see if fuel is in there.