20 hp kohler courage twin cam ohv engine sv600s losing oil

How long has it been since last running? Are all the safety switches activated? Handles pushed back all the way? Sitting on seat (i presume) ? Parking brake engaged? I would also check the oil. What does the oil look like?

Since there different versions with and without gears it is best to read and following the instruction in the service manual.

Kohler K91 141 161 181 241 301 321 341 Service Manual pdf Google Drive

Get yourself a test spark plug for small engines

There is a small engine one & one for car with HEI
Ignition

Looks like a spark plug with an alligator clip on it

Look on the internet for one similar to KD 2757

Has to be for small engine & std ignition-- not electronic
ignition systems

need engine model number

that engine is junk... ask your question, I know all to well about those things. as for the manual, cant help there as what I see being Kohler Expert Certified is different than what you see

there is a compression release on the cam but make sure you have a strong battery a weak battery will act like like a compression problem

check the safety switches bypass them one at a time to find the bad one the seat the clutch/brake pedal the pto lever

go to youtube they have videos on how to adjust governor

http://www.kohlerengines.com/engines/onlinecatalog/pdf/sm_20_690_01.pdf

page 69

Hmmm... first off, check the oil and make sure it's at the proper level - low oil can cause overheating. Second, if you haven't cleaned the engine and it's full of yard dirt and dust then you need to blow it out with about 100psi of air. Blow down through the cooling fan on top of the engine and make sure all the fins around the cylinders are clean of debris. Sound like the engine is cooking..