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25 hp 4 stroke. Bigfoot? Prop?

I recently acquired a 1998 25 hp carbureted 4 stroke Mercr, serial number OG735981. Runs good, needs a prop.

In shopping around for a prop, I see occasional references to "Bigfoot", which I know has something to do with drive gear ratio (but I don't really care about the details). All I really want to know is how I can determine if this particular motor is "Bigfoot", since there is no indication on the motor or cowl and I have no other frame of reference. Since it may be relevant to prop selection. Anyone know how I determine / verify whether this motor is a "Bigfoot"?

I just want to get a well matched prop. Will be putting this motor on a 14' 3" aluminum V-hull boat (Lund), which weighs about 230 pounds and I figure on about 400-500 lbs. of "cargo" (people, gear and a full six gallon fuel tank).

Any informed input or guidance would be welcomed and much appreciated. Mere guesses won't help me much. Thanks in advance.
 
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What's the serial # and model#?

Michigan Propeller
Send them the specs on the boat, length, weight, load you expect to carry, include equipment and fuel.
They can send you the size you need.
 
What's the serial # and model#?

Michigan Propeller
Send them the specs on the boat, length, weight, load you expect to carry, include equipment and fuel.
They can send you the size you need.

Serial number was already provided in my original post above. Model is 25 ML (according to transom bracket label). Carbureted 4 stroke, since confirmed as "Bigfoot".
Thanks for the suggestion. I will look up the contact info for Michigan Propeller and will pursue this further. Since I originally posted my question, previous owner found the old prop which was 10 1/2 x 13P (but too beat up to reinstall), but I have some doubts that it was well matched to the motor.
 
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