Ok, here goes... I bought this boat used... ran great when I got it... we spent 5 hours on it before i bought it from a guy that I know...
1998 Caravelle interceptor
5.7GS Volvo Penta motor
350hrs
I have been out on it a couple of times ran great when I had it out... One day when I came back the motor would not start, acted like the starter went out, you know the noise makes when that happens, so no biggie replaced the starter... whell that was not it...
It turns out that I got water in the cyclinders, from everything that I have read I could have just hydrolocked it when going full speed to almost a dead stop... So, i empty out the water out of the cyclinders, check the oil ( it looks like oil and is not milky as if water would have mixed with it) put all new plugs in, oil, filter... started it up on the pig ears and took it out for a spin... ran great no problems...
well i get back tot he dock and turn it off and back the jeep down and go to start it and "tank" that same unsettleinig noise again... UGH!!! yep same thing... so, i do some more research and talk to a couple of people about it and decide well since it was in salt water before I got it, i shoudl replace the riseres and manifolds cause i know they can leak into the motor also...
so i replace the risers and minifolds, and even for procaution i put on flappers over the exhaust coming out just so water can not run back up into the echaust.... do everything again, check the oil, its still oil, not milky, so i change it , filter and the boat starts up and runs great I take it out and after running it for about an hour i come back in and the same damn thing happens again...
ok, so this is where I am, I only really have 2 options left:
1. since the oil and water are not mixing it is telling me that the water is gettting in the top part of the motor and not the bottom end and mixing with the oil.
2. This leaves me to think of the following things that it could be...
2A. I have a cracked intake manifold.
2B. I have a leaking head gasket : dont think that it is this cause the motor would run rough- the temp never moves off 150
2C. I have a cracked block somewhre on the inside that is only leaking into the top part of the motor...
Any suggestion on what I am thinking would be more than helpful before I start tearing the motor apart this weekend.... I cant really think of anything else that would cause it... Water in the gas tank, would not have gallons in it since every cyclinder is full, the boat would jsut not run at all....
thanks again for all the help...
AT:facepalm:
1998 Caravelle interceptor
5.7GS Volvo Penta motor
350hrs
I have been out on it a couple of times ran great when I had it out... One day when I came back the motor would not start, acted like the starter went out, you know the noise makes when that happens, so no biggie replaced the starter... whell that was not it...
It turns out that I got water in the cyclinders, from everything that I have read I could have just hydrolocked it when going full speed to almost a dead stop... So, i empty out the water out of the cyclinders, check the oil ( it looks like oil and is not milky as if water would have mixed with it) put all new plugs in, oil, filter... started it up on the pig ears and took it out for a spin... ran great no problems...
well i get back tot he dock and turn it off and back the jeep down and go to start it and "tank" that same unsettleinig noise again... UGH!!! yep same thing... so, i do some more research and talk to a couple of people about it and decide well since it was in salt water before I got it, i shoudl replace the riseres and manifolds cause i know they can leak into the motor also...
so i replace the risers and minifolds, and even for procaution i put on flappers over the exhaust coming out just so water can not run back up into the echaust.... do everything again, check the oil, its still oil, not milky, so i change it , filter and the boat starts up and runs great I take it out and after running it for about an hour i come back in and the same damn thing happens again...
ok, so this is where I am, I only really have 2 options left:
1. since the oil and water are not mixing it is telling me that the water is gettting in the top part of the motor and not the bottom end and mixing with the oil.
2. This leaves me to think of the following things that it could be...
2A. I have a cracked intake manifold.
2B. I have a leaking head gasket : dont think that it is this cause the motor would run rough- the temp never moves off 150
2C. I have a cracked block somewhre on the inside that is only leaking into the top part of the motor...
Any suggestion on what I am thinking would be more than helpful before I start tearing the motor apart this weekend.... I cant really think of anything else that would cause it... Water in the gas tank, would not have gallons in it since every cyclinder is full, the boat would jsut not run at all....
thanks again for all the help...
AT:facepalm:
