Re: What hp?
We can't tell a Merc horsepower by the serial number alone - must have the model number. Mercs are usually pretty good about putting the horsepower in several places, or at the very least, the model number. (.ie, Model 400 is a 40hp, Model 1500 is a 150hp, model 110 is a 9.8hp, etc.) Lacking the (duck motor?) you might be able to find some other identifying marks (Comet? Lightning? Panther? etc.) How many cylinders? How many carburetors?<br />- Scott