On Mon, 01 Nov 2004 07:58:50 GMT, "Mr Wizzard"
wrote:

Zodiac zoom 285 (9.35 feet), rated at 8 HP max....

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Before you try a bigger motor, which I don't recommend if it exceeds
the max hp rating, why not try a prop with a little less pitch. In
effect it will be like switching to a lower gear which may be just
enough to get you on plane consistently.