Birddog1148
Cadet
- Joined
- May 11, 2014
- Messages
- 11
Picked up this used boat, motor and trailer last fall. The engine is a '85 25hp Johnson electric start. Last fall I took it out once and it ran fine but the bow was way up. Last weekend I put a Hydro-fin on the cavitation plate. Took it out today and it ran fine for a few minutes then lost power and died. Smoke came out from under the cover and I heared sizzling. She cranks over fine but no fire, did get a couple backfires but that is it. Took it back to the shop and put the compression tester on it and both cylinders read 28 psi. When I put some oil in the cylinders the compression check bumps up to 30 PSI. That's as far as I have gotten. I read on an old post on here about a similar situation. I suspect the over the winter my water pump went bad and it overheated, head gasket maybe? Nothing looks unusual under the cover and when it cranks it could not see or feel any leaks.