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Gjac's avatar
Gjac
Explorer III
Sep 08, 2021

Kohler 5CKM21 no compression in both cylinders

Finally got to go camping last week, started the genset to heat lunch, it started right up, ran for no more than 10 mins then died. Would not start again. Checked fuel pump plenty of fuel squirted out...
Gjac's avatar
Gjac
Explorer III
Sep 22, 2021
Update. I poured Chemtool into spark plug holes it did leak down somewhere. Maybe past rings because it is thin maybe down valves. The engine has opposing pistons which are horizontal. After two applications of Chemtool and soaking for 4 days I added motor oil and that seems to be holding in the cylinders. I am hoping if it is a valve being stuck this combination would free it up.

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