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Old 10-10-2016, 11:05 PM   #25
Mako
Guru
 
City: Seattle
Join Date: Jun 2012
Posts: 3,312
Quote:
Originally Posted by garrobito View Post
Actual engine is 170 hp and give more or less 8 knots at full power. Hull speed is 9.7 so I would install something a little more power (close to 200 hp).... I think 260 hp it's the absolute minimum for this boat (46' x 15', around 20 tons displacement).
Garrobito, the numbers you've given above don't jibe. But instead of trying to calculate power, just do like ski mentioned and measure your power at various speeds. From that you can extrapolate how much is needed for V/L 1.34, if you really think it's necessary to reach that speed.

BTW, you are exempt from having to install a T-3 engine as long as you trade-in to the dealer (don't sell the DD engine on your own unless you can prove transfer - check this with the dealer first). A good ole mechanical T-1 will get almost 10% better fuel economy. And absolutely stay away from glow plug engines. That Yanmar is the wrong solution.
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