Jay N
Guru
- Joined
- Oct 6, 2007
- Messages
- 503
- Location
- USA
- Vessel Name
- WESTERLY
- Vessel Make
- 1974 Pacific Trawler 37
JLD says: "Given that I would bet that most folks run their Tugs in the 8 knot range, I wonder what would be the expected life of a well maintained 220 h.p. Cummins 6BT? I see many of these boats (1998-2002 ish) with 2000 - 2400 hours on them. Wonder if they would easily go another 2000 - 2400 hours? I would also wonder about the 270 h.p. version of the Cummins 6BT that came out in 2003?"
WESTERLY has a 1988 6BT5.9 210hp that just turned over 8000 hours while running 1650-1750rpm (7.4-7.8kts). I've had to replace injectors twice, but the engine is still good to go. 12000 hours before top end? I've heard of them going longer.
Also on my dock, there is a 2000 Nordic Tug 37 with a 6BTA 330hp that just turned over 8500 hours while running around 8 kts. Last year, they checked compression and blowby, reconfigured the exhaust system, and rebuilt the injectors; Cummins mechanic felt that the engine was about half-life.
Don't know anything about the 270hp model.
WESTERLY has a 1988 6BT5.9 210hp that just turned over 8000 hours while running 1650-1750rpm (7.4-7.8kts). I've had to replace injectors twice, but the engine is still good to go. 12000 hours before top end? I've heard of them going longer.
Also on my dock, there is a 2000 Nordic Tug 37 with a 6BTA 330hp that just turned over 8500 hours while running around 8 kts. Last year, they checked compression and blowby, reconfigured the exhaust system, and rebuilt the injectors; Cummins mechanic felt that the engine was about half-life.
Don't know anything about the 270hp model.
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