Thread: Cummins....
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Old 12-30-2010, 05:50 AM   #21
O C Diver
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City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
Cummins....

Quote:
FF wrote:

rpm with a 6BT 220 HP.

This is probably the truck rating.

If you find the 24/7 rating it may well be half of that , so 45 hp is not all that bad.

The key for a trawler is NOT to have a turbo, that may require some minimum RPM in order to survive.
The original 6BT motor was 210HP. Continuous duty rating was 15% less.* This was for marine applications long before Dodge started putting them in trucks. They also made a 6B natural at I think 150 HP. Over the years they just kept cranking the out put up and adding after coolers etc. You can get 370 HP out of a 6BTA. This is like the DD 6-71 story. My Grey Marine (original 6-71) was 165 HP. When they were done with it, the JT turbo 4 valve head was over 400 HP I believe.

Anyway, the 6BT 210 HP was the original bullet proof engine that ended up in so many 28 to 40' commercial crabbing boats on Chesapeake Bay.

Ted

*


-- Edited by O C Diver on Thursday 30th of December 2010 08:01:37 AM
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