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JD G100 Kohler CH25s engine will not turn over


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#1 bprzyw OFFLINE  

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Posted May 18, 2016 - 08:34 AM

Hello:

 Got a 2003 JD G100. Bought new. Recently started leaking oil near oil filter. Pulled engine, found pan gasket bad in that area. Cleaned, replaced gasket, reassembled. Will not turn over, key seems to bump engine 1/10th of a turn and that's it. Replaced starter, same issue. Any guesses? It has a Kohler CH25s engine with 833 hours on it. Ran fine until I replaced oil pan gasket.

Thanks

Bernie

 



#2 crittersf1 OFFLINE  

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Posted May 18, 2016 - 10:09 AM

Will engine turn by hand? Can you hear something hitting?



#3 JD318420 ONLINE  

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Posted May 18, 2016 - 11:43 AM

Does the unit have "ACR" these can lock up and make it hard to crank/start. Download the engine manual from kohler web site



#4 Auburn David OFFLINE  

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Posted May 18, 2016 - 11:45 AM

try removing the plug..if you turned it on its side it could be hydro locked with oil.



#5 bprzyw OFFLINE  

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Posted May 18, 2016 - 12:11 PM

Cannot hear anything hitting. Yes, turned on side. Would that be the oil sentry? Thinking its a CV730 not a CH25s.



#6 bprzyw OFFLINE  

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Posted May 18, 2016 - 12:20 PM

Cannot find a picture of where the ACR is located.



#7 JD318420 ONLINE  

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Posted May 18, 2016 - 12:54 PM

1st check valves, get them to within the spec for play. ACR's are on the cam.

 

The ACR is a part of the cam. There are very fine springs that hold little arms in place until the engine reaches 300 RPM. If the springs fail, the ACR is deactivated, meaning that the engine will be under full compression all the time, and hard to start. The only way to repair the ACR is to remove the cam.


Edited by JD318420, May 18, 2016 - 12:57 PM.


#8 JD318420 ONLINE  

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Posted May 18, 2016 - 01:20 PM

google picture kohler acr and then you will see all the different styles on kohler



#9 bprzyw OFFLINE  

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Posted May 19, 2016 - 07:47 AM

Thanks for all your help guys !!!!!!!!!!!!!



#10 bprzyw OFFLINE  

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Posted May 24, 2016 - 07:03 AM

Pulled engine apart last night, pulled camshaft, no ACR at all. No engine ID tag on it either. Was able to turn by hand at that point. So, lost at this time. Running awesome before replacing oil pan gasket, what gives here??? Oh, watch the keyway on the crankshaft, its pretty sharp (as I learned last night) :wallbanging:

 

Lined up dots on crank and cam. So, engine is a CV-25 turns out after all. The CV730 replaced this model.


Edited by bprzyw, May 25, 2016 - 07:27 AM.


#11 bprzyw OFFLINE  

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Posted May 27, 2016 - 08:59 AM

Turns out, the governor gear was stopping the engine from turning over. Finally snapped it in half. Engine turns over by finger with plugs removed. So ordered new.

Thank you.


  • Auburn David said thank you

#12 bprzyw OFFLINE  

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Posted June 02, 2016 - 08:01 AM

Ok, closure on this. New governor, new governor pin, new pan gasket, line up dots on cam and crank, reassemble, still able to turn by hand, put in tractor, fired right up, running smooth. I think part of the problem was a stuck lifter, engine would turn by hand and hit a spot, then freeze, I removed that lifter and worked it till she freed up, put back in and good to go! Thank you everyone.

On to the Bolens 1886-01 project!!!!!!!!!! :wallbanging:


  • Auburn David said thank you




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