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post #1 of 4 Old 12-28-2002 Thread Starter
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Breaking in a Diesel

I am looking an 1987 S2 with a Volvo Penta that was rebuilt in 2001. I know nothing about diesels (moving up from a nice, simple outboard), but I''m a little concerned about this one because it seems to run a bit rough. It seems reluctant to start when cold (maybe that''s just a diesel) and doesn''t like to idle below 1,000 RPM. The owner says the rebuilder indicates the engine is not really broken in yet. She''s got about 50 hours on her. Just how long does it take to break in a diesel? Once warmed up, she has plenty of power and doesn''t smoke.
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post #2 of 4 Old 12-28-2002
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Breaking in a Diesel

I dont know about that. My motor after rebuild ran like a top. Try asking your question on marineengine.com. There is a message board totally devoted to marine engines. I am sure you will find a better answer.-thomas
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post #3 of 4 Old 12-28-2002
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Breaking in a Diesel

Hi
50 Hrs is plenty of time for a break-in. Sounds like you need to do a compression test cold and hot. Wet and dry. Sounds like a low cylinder. Diesels are really very simple. It must have good compression hot and cold. Unless your in sub freezing weather it should start fairly easily even without glow plugs or a block heater. There should be a cold rich fuel control device that acts simular to a choke on a gas engine. If compression isn''t the problem then the injector pump or injectors is suspect.
Good Luck, Jim
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post #4 of 4 Old 01-03-2003
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Breaking in a Diesel

Adjust your valves. Then double check them after some run time. Be sure to follow your manual as to whether there is a "hot" and "cold" differential or they simply are adjusted in on condition or the other.
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