Anybody know cruise speed on a 70's 42c w/ 6-71 naturals? I was surprised to hear from a friend who's looking that there were any naturals. My dad had one years ago with Cummins VT903's, and I knew there were many with 6-71 turbos. My friend's no speed demon, but he'd like to know. Thanks
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Thread: 42c w/6-71 naturals
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42c w/6-71 naturals
-- Paul
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Re: 42c w/6-71 naturals
I didn't know they built them with naturals, either. Sounds like a 15-16kt boat.
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Re: 42c w/6-71 naturals
My 37C with 671N advertised is 18knt cruise max 21
real world 14-16 Cruise 17-19 Top end
42 should be about the same
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Re: 42c w/6-71 naturals
Hello, my 42 with natural 903's runs 18 knots at 2150 rpm. I'm sure that it may be a little different with DD but it gives you and idea.
Walt Hoover
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07-09-2020 01:28 PM #6Registered Member
- Join Date
- Dec 2009
- Posts
- 13
Re: 42c w/6-71 naturals
Running them WOT should not be a problem. you are pushing out much less HP than a turbo/ large injector motor.
I think the issue is will it fall of plane in rough sea/heavy load. will the boat be a dog in with this HP?
I think it will. the worst thing is falling off plane going in a head sea.
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