On Sat, 22 May 2004 18:49:22 GMT, "Don White"
wrote:

My 18.6 foot sailboat at 1200 pounds has a 6 hp outboard as it's auxiliary

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That's fine for your boat but the question was "how much horsepower is
needed to get on plane?".

The real question is how much horsepower to you need to be happy with
the boats performance. My guess is that lightly loaded and with one
person aboard you could probably get the boat to plane with about 25
hp. To be able to plane consistently with more than one person,
reasonable fuel, and a fair amount of gear, you'd probably be happier
with 50 to 90 hp.