"I picked up a 1975 trisonic w
"I picked up a 1975 trisonic with a mercruiser 888 ford 302. The previous owner did not winterize it last winter and when he got it out this past summer he realized it had a cracked right manifold. So he replaced that and when he started it up he said it had a lot of blow by. He said oil and smoke was coming out of the left valve cover. He took it out to see if it would clear up but it never did. He said he winterized it this winter. Thats all the information I got from him. It says it only has 480hrs on it. He said the boat ran great the summer before he didnt winterize it. So this weekend I changed the oil which looked good, except for being dirty. I pulled the plugs and they were all fouled. I tried to do a compression test and when I turned the motor over, oil shot out of 3 or 4 spark plug holes. This was after I changed the oil. I dont know if the previous owner put oil down the spark plug holes when he winterized it though. I decided to go ahead and pull the engine. So I pulled it and tore it down yesterday. 2 or 3 of the pistons had oil sitting on top of them when I pulled the heads. The only obvious thing I noticed was one of the intake valves had a crack/chip in it. The crank looked good and spun smoothly but the flywheel was slightly bent. The pistons looked ok and the cylinders looked good. The water ports had a lot of rust and corrosion in them. I know a little about engines and this is the first time I have ever messed with a marine engine. I had a guy that knows engines look at it and he said everything looked good. He said I could probably get by with just having the heads done and replacing that bad valve, re-ringing it and having the flywheel straightened. I just want to get some more opinions on here and see if there is anything else I need to check or worry about. Also where can I get a service manual for this engine? btw, the serial number is: 3977084. Thanks"
"I picked up a 1975 trisonic with a mercruiser 888 ford 302. The previous owner did not winterize it last winter and when he got it out this past summer he realized it had a cracked right manifold. So he replaced that and when he started it up he said it had a lot of blow by. He said oil and smoke was coming out of the left valve cover. He took it out to see if it would clear up but it never did. He said he winterized it this winter. Thats all the information I got from him. It says it only has 480hrs on it. He said the boat ran great the summer before he didnt winterize it. So this weekend I changed the oil which looked good, except for being dirty. I pulled the plugs and they were all fouled. I tried to do a compression test and when I turned the motor over, oil shot out of 3 or 4 spark plug holes. This was after I changed the oil. I dont know if the previous owner put oil down the spark plug holes when he winterized it though. I decided to go ahead and pull the engine. So I pulled it and tore it down yesterday. 2 or 3 of the pistons had oil sitting on top of them when I pulled the heads. The only obvious thing I noticed was one of the intake valves had a crack/chip in it. The crank looked good and spun smoothly but the flywheel was slightly bent. The pistons looked ok and the cylinders looked good. The water ports had a lot of rust and corrosion in them. I know a little about engines and this is the first time I have ever messed with a marine engine. I had a guy that knows engines look at it and he said everything looked good. He said I could probably get by with just having the heads done and replacing that bad valve, re-ringing it and having the flywheel straightened. I just want to get some more opinions on here and see if there is anything else I need to check or worry about. Also where can I get a service manual for this engine? btw, the serial number is: 3977084. Thanks"
