Join Date: Feb 2011
Location: San Francisco Bay area
Thanked 83 Times in 82 Posts
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Re: Universal M5411 Engine 11HP
I have a 31ft boat, about the same dimensions as the C30 (but less beamy with a more pointy bow), with the 5424. I always cruise at about 1/2 throttle, which gives just over 6 kts. Recently I was powering into a chop to make the last 1/2 mile into a marina, and the boat was slowing down to 5 kts. Now and then you'd get 2 or 3 larger waves in succession, and the speed would drop off to 4 kts or less.
I think 24hp is about right.
I've sailed a Catalina 27 with the 11hp, and that felt a bit underpowered.
Bristol 31.1, San Francisco Bay