Alrighty then...Tell us, tell us, tell us.
The stbd engine was not pushing much at all. Had the owner tried to power the boat from the starboard engine alone, the fault would have been obvious. But he always pushed up both throttles together.
Yes, very possible, but the volvos take a long time to push the boat up to plane. Long enough for the owner to compensate with the hydraulic steering. In his mind, the port eng would only get to 2600 rpm with heavy smoke and the stbd ran right up to 3800+ with no smoke. He came to the conclusion right there that the port eng was the problem. The mechanics came aboard to troubleshoot why the port engine would not rev up and was smoking.But given that the port engine would have behaved normally and got to normal RPM for that throttle position, and the boat would have turned to starboard, hence indicating an weakness issue with the starboard engine? No?
I hope he got a big refund for them replacing everything but the block on the port engine!
Let me know when you find any mechanical repair shop that will do that......
Happened to me and the result was a total repower. Both engines removed and rebuilt, new transmissions, etc. etc. for my cost of 16K. Yard were very quick to put their hand up and say it was down to them.
I'll tell that story one of these days.