twister216
Cadet
- Joined
- Jun 26, 2010
- Messages
- 7
Hi all. I'm new to the board. Looks like a lot of good info here. Here's my dilema. I'm having an overheating problem that I can't figure out. Maybe someone can help.
First off the history: I purchased a 1979 Caravelle BowRider from a friend in the fall of 2008. My dad had recently retired and I figured it would make a good project for him. The problem then was one of the spark plugs had blown the porcelin tip out of it and we got couldn't get it out of the head so we took it to a marina. They couldn't get it out either so they removed the head and sent it off to a machine shop. During the tear down they noticed water/rust in the cylinders and told us it would be best to rebuild the engine. After Overhaul kit, rings, rod bearings, main bearings, timing chain, oil pump, water pump, flywheel, upper gear seals and new motor mounts they informed me the transom was rotting. So a transom rebuild thrown in there also for a total of $5280.14 and we were set...or so we thought.
Over the winter we had the interior reupholstered for $750. Last summer we take the boat out and it overheats. We take it back to the marina. They said it was running fine after the rebuild but would check it out. They changed the impeller, impeller housing, and went from a 3 inch heat exchanger to a 4 inch for another $657. We get the boat back and still have an overheating problem. My dad took it out a couple more times last summer and had to be towed in both times. The marina started giving us the runaround. They were backed up 4 weeks and it would take that long to just look at it. So it set up over this past winter.
About a month ago my dad calls me and tells me to come get it out of his yard. He's tired of messing with it. I get it and charge the battery up. It fires off first lick. It runs around 140 degrees on the muffs. I take it to the lake and it idles fine but when I put the RPM's to it the thing over heats up to about 220-240 degrees. I bring it home and change the impeller. It runs at 140 degrees on the muffs. Back to the lake it over heats when you put the RPM's to it. I take it to a different marina. They put it in the drum and run it at 3500 RPM's for 45 mins and it runs between 140 and 160 degrees. They pull the heat exchanger but find nothing plugging it. There's a steady stream of water coming out of both the gymball housing and the prop. I take it back to the lake and as soon as I put a load in it (RPM's) it over heats again.
It has both them and me stumped. Some one told me it could have the wrong head gasket on it. Maybe a water port is plugged off. I think if that was the problem it would've overheated when the marina was running it at 3500 RPM's. Chasing ghosts has become expensive so hopefully someone can help me figure this thing out before I take out a second mortgage on my house. Thanks!
First off the history: I purchased a 1979 Caravelle BowRider from a friend in the fall of 2008. My dad had recently retired and I figured it would make a good project for him. The problem then was one of the spark plugs had blown the porcelin tip out of it and we got couldn't get it out of the head so we took it to a marina. They couldn't get it out either so they removed the head and sent it off to a machine shop. During the tear down they noticed water/rust in the cylinders and told us it would be best to rebuild the engine. After Overhaul kit, rings, rod bearings, main bearings, timing chain, oil pump, water pump, flywheel, upper gear seals and new motor mounts they informed me the transom was rotting. So a transom rebuild thrown in there also for a total of $5280.14 and we were set...or so we thought.
Over the winter we had the interior reupholstered for $750. Last summer we take the boat out and it overheats. We take it back to the marina. They said it was running fine after the rebuild but would check it out. They changed the impeller, impeller housing, and went from a 3 inch heat exchanger to a 4 inch for another $657. We get the boat back and still have an overheating problem. My dad took it out a couple more times last summer and had to be towed in both times. The marina started giving us the runaround. They were backed up 4 weeks and it would take that long to just look at it. So it set up over this past winter.
About a month ago my dad calls me and tells me to come get it out of his yard. He's tired of messing with it. I get it and charge the battery up. It fires off first lick. It runs around 140 degrees on the muffs. I take it to the lake and it idles fine but when I put the RPM's to it the thing over heats up to about 220-240 degrees. I bring it home and change the impeller. It runs at 140 degrees on the muffs. Back to the lake it over heats when you put the RPM's to it. I take it to a different marina. They put it in the drum and run it at 3500 RPM's for 45 mins and it runs between 140 and 160 degrees. They pull the heat exchanger but find nothing plugging it. There's a steady stream of water coming out of both the gymball housing and the prop. I take it back to the lake and as soon as I put a load in it (RPM's) it over heats again.
It has both them and me stumped. Some one told me it could have the wrong head gasket on it. Maybe a water port is plugged off. I think if that was the problem it would've overheated when the marina was running it at 3500 RPM's. Chasing ghosts has become expensive so hopefully someone can help me figure this thing out before I take out a second mortgage on my house. Thanks!
