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Join Date: Sep 2005
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For a boat of that light displacement, any more than 5 hp is, in my opinion, too much. The light weight of the ever-more-efficient 2 strokes is an advantage, along with lower initial cost, while the oil mixing issue remains a bit of a pain.
Two other points:
Many of the small (5hp and less) motors are made by the same manufacturer regardless of the brand (eg - Merc & Nissan 5 hp both made by Tohatsu.) Interestingly Nissan offers twice the warranty.
While the exhaust at the prop can be a problem in reverse, many of these small motors allow 360 degree rotation, allowing you to "Back up" with the motor spun around in FWD gear - no exhaust in the prop.