Kohler CH11S timing flywheels and crank shafts
Posted: Sun May 08, 2011 10:42 am
Ok I'll be honest this engine is not in a tractor but you guys seem to know quite a bit about Kohler engines so I have a question.
I recently aquired and repaired a CH11S that had a broken crank shaft. The PTO end was broken off no internal damage. In an effort to save some money I purchased a different crank shaft off of eBay. I used the TP-2179-B crank shaft manual to make my selection. This book seems to indicate that the internal and flywheel end of these crankshafts are the same and the differences are only on the PTO stub.
I sold the engine to a guy to use for a log splitter. It starts and runs good with no load on it but once he connected it up to his hydraulic pump it won't start at any throttle position. I had him try a larger battery thinking it wasn't turning fast enough due to the external load. This didn't help. He tried higher octane AV gas fuel. Still din't help.
This got me thinking about timing. I looked up the engine code the used crank came from and the original spec number and found the two of them use different flywheels. I still have the original crank the broken one and it looks like the flywheel key slot is even with the rod journal so making a leap I figure the timing is in the key slot in the flywheel. If the timing is somehow late that should create a loss of power and an extra high exhaust temperture as the combustion whould still be under way as the exhaust valve opens.
This guy lives 2 hour drive from me so I haven't been able to check anything except via remote control through him.
So here is the question. Would I have a timing problem due to the replacement crankshaft?
Original engine spec CH11S-16102 The crankshaft came from CH12.5-1939
Original crankshaft 12 014 30-S new crankshaft 12 014 32-S and I think it was from a tractor application
I can provide a ink to the crankshaft manual if anyone wants it.
Thanks
Steve
Anchorage, Alaska
I recently aquired and repaired a CH11S that had a broken crank shaft. The PTO end was broken off no internal damage. In an effort to save some money I purchased a different crank shaft off of eBay. I used the TP-2179-B crank shaft manual to make my selection. This book seems to indicate that the internal and flywheel end of these crankshafts are the same and the differences are only on the PTO stub.
I sold the engine to a guy to use for a log splitter. It starts and runs good with no load on it but once he connected it up to his hydraulic pump it won't start at any throttle position. I had him try a larger battery thinking it wasn't turning fast enough due to the external load. This didn't help. He tried higher octane AV gas fuel. Still din't help.
This got me thinking about timing. I looked up the engine code the used crank came from and the original spec number and found the two of them use different flywheels. I still have the original crank the broken one and it looks like the flywheel key slot is even with the rod journal so making a leap I figure the timing is in the key slot in the flywheel. If the timing is somehow late that should create a loss of power and an extra high exhaust temperture as the combustion whould still be under way as the exhaust valve opens.
This guy lives 2 hour drive from me so I haven't been able to check anything except via remote control through him.
So here is the question. Would I have a timing problem due to the replacement crankshaft?
Original engine spec CH11S-16102 The crankshaft came from CH12.5-1939
Original crankshaft 12 014 30-S new crankshaft 12 014 32-S and I think it was from a tractor application
I can provide a ink to the crankshaft manual if anyone wants it.
Thanks
Steve
Anchorage, Alaska