Turbo diesels aging gracefully?

[a64pilot]

Originally Posted by peter57

Hi a64,



Could I ask what size prop are you using and what RPM you cruise at and speed in smooth water?

I run an Autoprop and get 6.5 kts at 2000 RPM in smooth water, no wind.
Motorsailing between 1000 and 1500 RPM the noise level from the motor is very nice, at about 2000 RPM it gets "buzzy", sure would be nice to cruise at that lower RPM when there is no wind.
Of course sailing is preferable, no motor then.
I have sort of a love / hate relationship with the little Yanmar, I love that it's so reliable, sips fuel, but I hate having to listen to the thing.

[NewMoon]

Originally Posted by jimbunyard

Regarding fires started by 'red-hot' turbos. Most modern marine turbos have freshwater cooled exhaust volutes; for them to become red hot they would have to loose most or all or their engine's coolant. It would be hard to imagine that this could happen without seizing the engine before the turbo got to redhot, but I guess anything is possible.

Our Volvo KAD44P can run all day at 3200-3400 RPM and the fresh-water-cooled turbo never gets even close to red hot. Here's a photo of the engine at approx 5,000 hours: