Tryed posting before came up under cavitation problem. Anyway motor ran fine for 30 minutes and begin to sputter and stall. Would restart easily but idle very rough and stall. Able to run above 2500RPM with almost no misfire. Checked for water in fuel found none so far. Plugs and wires ok. Secondary ohm test on coils ok. Found loose ground on power pack no corrosion. What else should I check for?
