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Old 07-22-2021, 02:58 PM   #1
Join Date: Jul 2021
Posts: 1
Default Cummins 350's vs 370's

I am new here but have several years in a Cruiser's 3075.
Looking at two 4100 SCA's presently as a possible purchase for the loop in 2023.
Is there a significant difference in performance between the two Cummins engines noted? Please advise. Thanks, Drew

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Old 07-23-2021, 12:39 AM   #2
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Join Date: Feb 2012
Location: Essex, Maryland
Posts: 9,031

Not many big Maxum’s on this site. You may get a better response from a boat diesel forum. Good luck getting a reply and let us know what advice you get.

1997 2400 SCR
5.7 Vortec / Bravo 2

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Old 07-23-2021, 02:26 AM   #3
Join Date: Mar 2012
Location: Live in Mandevill, LA - Boat in Pensacola & Perdido, FL
Posts: 54

Same engines for size, displacement, compression ratio, etc. Perhaps different injector and injector pump. Early 330 had a lighter fly-wheel than 3700 that caused "chatter" in gear box and MULTIPLE failures of xtans. The 370 spins faster that the 330. 3000 rpm suggested "max" for the 370 and 2800 for the 330. Both very reliable mechanical diesels. More important, how were they maintained and operated. And if one is fresh water vs. salt water!
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