mshiff62
Seaman Apprentice
- Joined
- Jul 5, 2013
- Messages
- 36
1984 Mercruiser 470 3.7L.
So I had big hopes of boating all weekend. That went out the window fast. I put it in the water, started it up, the oil pressure was at 80psi, and it was idling extemely low about 300rpm, pushed the throttle wide open and nothing changed, in which it then choked out. I got it to restart but it was making some clanging noises and running really rough. I put it in gear and barely atared moving, maybe at 800 rpm, and I looked back and smoke is rolling out of the motor. I was able to nurse it back, in which as soon as I tried to give it throttle it was smoking like crazy and oil pressure was at about 30psi, occasionally it would stall out. So on the trailer It went.
So, here is what I have tested/observed so far.
-oil all around valve cover, in flame arrestor, carb, and on head.
-spark plugs were solid black, not wet/oil
-pulled valve cover, very minimal oil, springs, rockers, rods all looked ok.
-turned over engine with no spark plugs, no oil coming out of cylinders.
That is all I can look at right now as I'm on vacation so my fiancee doesn't want me spending all weekend working on it. Any and all suggestions are apreciated and anyone who has experiance with these motors especially. Thanks!
So I had big hopes of boating all weekend. That went out the window fast. I put it in the water, started it up, the oil pressure was at 80psi, and it was idling extemely low about 300rpm, pushed the throttle wide open and nothing changed, in which it then choked out. I got it to restart but it was making some clanging noises and running really rough. I put it in gear and barely atared moving, maybe at 800 rpm, and I looked back and smoke is rolling out of the motor. I was able to nurse it back, in which as soon as I tried to give it throttle it was smoking like crazy and oil pressure was at about 30psi, occasionally it would stall out. So on the trailer It went.
So, here is what I have tested/observed so far.
-oil all around valve cover, in flame arrestor, carb, and on head.
-spark plugs were solid black, not wet/oil
-pulled valve cover, very minimal oil, springs, rockers, rods all looked ok.
-turned over engine with no spark plugs, no oil coming out of cylinders.
That is all I can look at right now as I'm on vacation so my fiancee doesn't want me spending all weekend working on it. Any and all suggestions are apreciated and anyone who has experiance with these motors especially. Thanks!