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mower was running fine lost power died now has knocking when trying to crank & dont have no compression.

dennis m. marr said:

mower was running fine lost power died now has knocking when trying to crank & dont have no compression.

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That doesn't sound good. First thing that comes to mind is a broken connecting rod....Pull the plug, and try to turn the engine by hand, and see if there is any movement of the piston.