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post #23 of Old 02-04-2013
MarkSF
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Join Date: Feb 2011
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Re: Repower confusion (horsepower)

It seems like 3 cylinder diesels, with balance shafts, are common in Europe. VW and Audi use them in smaller cars. I've also heard that BMW is bringing a 3 cylinder gas engine to the US, which they claim is smooth. Couldn't some of this technology trickle down to boats? When it comes to repowering, if one brand was significantly smoother and quieter than others, I'd be very interested.

Apparently, the main vibration mode with an inline-3 is fore-aft rocking. No wonder the engine mounts in a boat have to be solid. The good news is that just a single balance shaft reduces the rocking a lot.

Bristol 31.1, San Francisco Bay

Last edited by MarkSF; 02-04-2013 at 09:53 PM.
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