craveman85
Petty Officer 2nd Class
- Joined
- Jun 15, 2010
- Messages
- 107
My 1976 Johnson 75 HP 3 cylinder wasrunning ppoorly between idle and half throttle. Checked the carbs, ignition, compression... All good. Would push my 18' alumacraft 32 mph at full throttle. Went to start it again today and take it out after some carb link adjustments and it wouldn't start. Fuel and spark were good but wouldn't even fire. I pulled a plug to find a chocolate milkshake in the cylinders. Obviously water intrusion and a lot of it. I pulled the head and the gasket looks perfect. Held 110 top 108 mid and 108 lower compression. How much water can make it's way in from a faulty exhaust gasket? It looked like there was quite a bit in there and puddled up in the intake and exhaust ports. No water jacket cracks so I'm assuming that's my problem. Also any ideas on removing all the cover bolts without breaking them? I broke a few cylinder head cover bolts but they look easier to drill out