I have two used mowers I recently purchased to fix up. One has a Kohler Command 22hp V-twin, CV22-S. The other has, I believe a Kohler 18 horse, same engine.
Just for grins, I tested compression in each, and the two are wildly different. The 22hp reads about 100 PSI in one cylinder, and 110 in the other. The other (18 horse?) reads 210 PSI in each. Both run good, cut good, no noises.
The 18hp with the greater compression does burn a bit of oil, I think it's valve seals as it will smoke just a tiny bit when you idle down the engine from full throttle. One of the plugs was pretty filthy with deposits.
What would a usual compression be for these engines, and should I be worried about the huge disparity between them?
Just for grins, I tested compression in each, and the two are wildly different. The 22hp reads about 100 PSI in one cylinder, and 110 in the other. The other (18 horse?) reads 210 PSI in each. Both run good, cut good, no noises.
The 18hp with the greater compression does burn a bit of oil, I think it's valve seals as it will smoke just a tiny bit when you idle down the engine from full throttle. One of the plugs was pretty filthy with deposits.
What would a usual compression be for these engines, and should I be worried about the huge disparity between them?