Kohler CV740 only runs with choke fully closed, stutters when going up in RPM's

[Mothman]

Is that fixable?
My neighbor chimed in and said with absolute certainty the engine is dead, probably a busted cylinder, cracked or something.

A 5 year old knows more than me about these things right now so could he be right? Or do I keep spending money in fixing this (new governor perhaps)?

 

[Scrubcadet10]

a new governor is usually the remedy for fixing overspeeding, however i would try adjusting the governor first.



SERVICE MANUAL 24_690_07_Rev_K.indb - 24_690_07_EN.pdf

 

[Mothman]

Thanks, will give that a go this weekend

 

[Mothman]

Have not played with the governor yet but did do a compression test on the engine.
The service manual states the compression should be at least 160psi and I get 125psi on both sides with very little deviation between tests and sides, it’s consistent.
I am doing this test on a cold engine (no choice) and it’s 5C/41F in the garage.
Does these test results look favorable ruling out a cylinder/piston/rings/valves issue?
Pulling apart a push mower today so may not have a chance to work on the governor, hoping these tests give me some good news at least
Also, I checked the oil again and it definitely smells like fuel. In fact there is no difference in smells between the oil and a tual fuel tank.

 

[Mothman]

Update

Took the cylinder heads off and replaced the head gaskets which were in rough shape. Also put a new carburetor on and gave everything a good cleaning. Adjusted the governor while I was at it. The tractor runs great now. Still needs some tweaking but it's usable

 

[Paul54]

Governor moves the slow engine speed down , throttle cable assy and interconnected gov spring is trying open the throttle, balance between closing and opening forces when engine is run is governed engine speed , if your governor has no closing force , gov arm clamping bolt could be loose engine will Rev up too much and over speed , from your pictures I can see you are missing a small plastic gov link connector bushing ,

You could try downloading a manual on this model from
www.kohlerengines.com ,to go
Owners/service manuals
Fill in engine model and spec
(From your engine cowling)
Download service manual
All details for engine adjustment are there,

Cheers hope it helps