Appreciate any comments on this engine. Installed in 1981 into yacht.
It is said it has been well serviced and records show 3,800 hours. Salt water cooled. Is running well according to owner. Will inspect boat on Wednesday.
All Yanmars of that era have issues with the exhaustelbow getting blocked. Look for smoke when starting, be sure it revs to its rated max, try to find out if injectors and lift pump have been serviced. By now they should have been. Might want to pay for a compression test.