Volvo Penta - temperature problem

[mwkelton]

I have a 94 Chapparal with a 94 5.0L Volvo Penta FL. I have been having overheating problems the last few times out. I replaced the seawater impeller, which needed to be replaced anyway. After replacing, I still seem to be having engine temperature problems. The temperature does not seem to be constant, which is what I would expect it to do (the boat was bought a few months ago and I am new to I/O's). On idle, temp is around 130-140 F. When throttling up, the engine heats up to between 150-190, but swings back and forth from one extreme to the other. Sometimes, it stays around 190 then I throttle back and let it cool. It sounds to me like the thermostat could be faulty. Anyone else have similar experience?<br />Thanks.

 

[tommays]

Re: Volvo Penta - temperature problem

on the V-6 and V-8 motors its seams to be common to put the stat in wrong<br /><br />the new stat could be bad you can test it in hot water but it might be less trouble to just get a second one and be sure the parts go in the correct order<br /><br />tommays

 

[mwkelton]

Re: Volvo Penta - temperature problem

I didn't replace the thermostat, I replaced the seawater pump impeller. So, I do not know if the thermostat is installed correctly or not. But, to you, from what I described it sounds like a thermostat problem, right?

 

[tommays]

Re: Volvo Penta - temperature problem

its the first and easy thing to do when you have a problem like yours<br /><br /><br />water has to get IN and get OUT the stat is the first thing that will keep it from getting out<br /><br /><br />if your sure its really getting hot and not the GUAGE acting wackey<br /><br /> http://www.tflx.com/tech.html <br /><br />guage testing how to<br /><br /><br />tommays

 

[mwkelton]

Re: Volvo Penta - temperature problem

Thanks for the tips!