I have a 1991 Volvo Penta 2003 (non turbo) in a 1991 Beneteau 35s5. The problem that I have been having, for some time now, is this:
The water coming out of the exhaust does not come out as forcefully and as plentiful as it used to. It sort of drizzles out and a spray pattern rather than the splash that it used to make. The exhaust gets hot and I see steam coming out of the exhaust.
This is what I've done so far.
1. Disconnected the pipe after the raw water pump and connected a clear hose. Ran the engine under load and monitored a steady flow of water. No bubbles or anything unusual. I also had the water pump taken out and replaced the impeller. All the gears looked fine, no shaft play.
2. Took off the exhaust elbow and replaced it witha new one. The opening where the water pipe went in, was about 90% clogged with soot. I could not clean it, so I replaced it with new Volvo Penta one. This did not fix the problem, although it made it somewhat better (less steam)
3. The only other piece left is the heat exchanger at $800.00 USD.
Should I replace the heat exchanger?
Can I overhaul the heat exchanger for a lesser cost?
Am I on the right track or is there something else I need to be looking at?
As always, I appreciate any comments.
The water coming out of the exhaust does not come out as forcefully and as plentiful as it used to. It sort of drizzles out and a spray pattern rather than the splash that it used to make. The exhaust gets hot and I see steam coming out of the exhaust.
This is what I've done so far.
1. Disconnected the pipe after the raw water pump and connected a clear hose. Ran the engine under load and monitored a steady flow of water. No bubbles or anything unusual. I also had the water pump taken out and replaced the impeller. All the gears looked fine, no shaft play.
2. Took off the exhaust elbow and replaced it witha new one. The opening where the water pipe went in, was about 90% clogged with soot. I could not clean it, so I replaced it with new Volvo Penta one. This did not fix the problem, although it made it somewhat better (less steam)
3. The only other piece left is the heat exchanger at $800.00 USD.
Should I replace the heat exchanger?
Can I overhaul the heat exchanger for a lesser cost?
Am I on the right track or is there something else I need to be looking at?
As always, I appreciate any comments.