Derteeberd
07-10-2006, 01:51 PM
I need some help in diagnosing a problem of overheating. I checked the site very carefully and couldn't find anything to get me past simply changing the impellar and thermostat.
Last week, I was using the boat for the first time this year. The engine started overheating and burned out the insides of the mufflers. I checked the impellar and it was fried.
I replaced the impellar and it still started overheating and mroe smoky mufflers. I then changed the thermostat.
I have a PCM engine in a 1997 Moomba Outback. Engine ID - PLD 5.8 L
When at the auto dealer, we looked up the parts for a PCM engine and it called for a 142 deg therm. The one I took out was stuck shut and was labeled as 160 deg and was stock to the engine as I had to break the paint seal on the parts.
I changed the therm and took it for a ride, no more smoke and I could feel heat on the pipes coming from the engine into the headers. However, the engine temp gage still went over halfway, ran about 185 deg.
I took all the freshwater hoses off and blew them out and ran water through them to check flow. I also did the same on the transmission cooler and muffler and headers. All flowed well, in fact I could see the insides of my mufflers flow out into the lake as ash from the flareup.
I dont have a freshwater screen on the system.
The dealer said they are 3 weeks out on repairs and not taking appts. I want to get skiing for the summer before I have to take it in for storage. Any comments would help!
Anyone got any clues on what to check next?
Thank you
Aaron
Last week, I was using the boat for the first time this year. The engine started overheating and burned out the insides of the mufflers. I checked the impellar and it was fried.
I replaced the impellar and it still started overheating and mroe smoky mufflers. I then changed the thermostat.
I have a PCM engine in a 1997 Moomba Outback. Engine ID - PLD 5.8 L
When at the auto dealer, we looked up the parts for a PCM engine and it called for a 142 deg therm. The one I took out was stuck shut and was labeled as 160 deg and was stock to the engine as I had to break the paint seal on the parts.
I changed the therm and took it for a ride, no more smoke and I could feel heat on the pipes coming from the engine into the headers. However, the engine temp gage still went over halfway, ran about 185 deg.
I took all the freshwater hoses off and blew them out and ran water through them to check flow. I also did the same on the transmission cooler and muffler and headers. All flowed well, in fact I could see the insides of my mufflers flow out into the lake as ash from the flareup.
I dont have a freshwater screen on the system.
The dealer said they are 3 weeks out on repairs and not taking appts. I want to get skiing for the summer before I have to take it in for storage. Any comments would help!
Anyone got any clues on what to check next?
Thank you
Aaron