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Old 06-10-2012, 08:24 PM
gbettner gbettner is offline
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Location: Boggstown Indiana
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Please help! 25 horse Kohler engine compatability!

I've located a GREAT deal on a brand new 25 horse Kohler command engine to replace my current 25 horse Kohler command engine. The only difference I see is it has built in throttle/choke levers and key switch built into the shroud. I can easily switch over those items from my old engine to make it work.
I need to make sure there wouldn't be any other differences I'm not thinking of if someone who knows these motors could please confirm it will work for me. ( crankshaft diameter, etc...). I was going to put new rods in my old engine but this oprotunity popped up and I can't pass it up. Just don't want to get stuck with a motor that won't work on my scag turf tiger.

PLEASE HELP IF YOU CAN, I'd like to go get this thing as soon as the guy responds to my email if possible. Thanks a bunch everyone
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Old 06-10-2012, 08:41 PM
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piston slapper piston slapper is offline
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Location: Tampa Fl
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If the crank diameter and length are the same...the parts will interchange..
Save the tag and any paperwork so you can keep the new warranty...
Your old crank was suspect in your last thread...but it would interchange..
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Old 06-10-2012, 08:48 PM
gbettner gbettner is offline
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Thanks yet again piston slapper. Do my numbers tell my current crank length and diameter or do I need to run out to the garage and start tearing it down to see?

Engine numbers....

Family# SKH725U1GR2A
Model# CH25S
SPEC# 68579
displacement 725cc
Serial# 2814603631

I know I'm a pain in the but but I sure appreciate it!
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Old 06-10-2012, 08:57 PM
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piston slapper piston slapper is offline
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Don't have those numbers at my fingertips anymore...
The spec number will send your to a parts list and list the crank part #
The crankshaft # can then be looked up to check the specs...
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Old 06-10-2012, 09:07 PM
gbettner gbettner is offline
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Just went out and popped off the clutch to see, looks like I have a 1 1/8" diameter x 3 1/4" long shaft. I'll keep my fingers crossed.
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  #6  
Old 06-11-2012, 12:12 AM
gbettner gbettner is offline
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Location: Boggstown Indiana
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Well looks like it's going to work good enough. After talking to the guy over the phone he measured the diameter and length, the diameter is a perfect match but the length is about a half inch longer.
The good news is instead of cutting the crank or shimming the motor back I can just get my Dad to machine down the end spacer/washer thingy that the crank bolt goes through to attach the clutch ( make it shorter to compensate for the longer crankshaft ) solving all alignment issues.
I'm getting a brand new engine for 800 bucks!
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Old 06-13-2012, 07:33 AM
gbettner gbettner is offline
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Location: Boggstown Indiana
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Got er going last night. Only issues were having to switch around some wires in the harness plug. My Dads machine work worked out perfectly also.

I love the smell of a new motor heating up for the first time.
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