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Old 04-15-2010
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Outboard Sizing???

I have a Venture 21 (light displacement, swing keel) and was wondering what size out-board to put on it? Let me start at the begining-I already have bought an out-board, but I suspect that it's perhaps a bit overkill, and will diminish the boats abiliy to sail, but I don't really know, so here I am asking you. The out-board is a nice 9.9hp, two cylinder, Honda 4-Stoke, with extra long shaft (25" - perfect for my boat) and it weighs in at 108 lbs. Just by looking at it looks a bit large off the transom, and being that heavy, and that far away from the boats center of gravity, makes me wonder. I also found a brand new6hp Tohatsu/Nissan 4-stroke/w extra long shaft that I could buy for the money I could sell this one for, it's a single cylinder and only 60 lbs! - easy to handel and store. But is 6-hp enough, even for the ocean? I'll try it out in a lake near my house after I'm done fiberglassing in the bulkheads, and mounting all the deck hardware. I plan to bring buckets with me, fill them with water (to simulate the weight things aboard) and distribute them so as to get the painted waterline of the boat level, telling me where to put weight, and just how much I can put. Well, at this point I guess I'm just blabbering, and so as not to continue - Thanks for your answers
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Old 04-15-2010
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9.9 is more than enought for that boat. You could probably get away with four. Five would be perfect. Six is more than enough. Make sure to get the HT prop for that particular motor. It is weak for a six, so it is probably a good choice, I have heard that it vibrates quite a bit. A rubber mount plate may be wise.
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