Re: Prop for 40hp Mercury 4-stroke not bigfoot
My wot rpm is now 6000, no speedo or gps, got the prop off and the only numbers found are Michigan 032141, found not under the nut but on the back side of the prop on inside washer, best I can measure it's a 12 inch prop, prop decal on motor is scratched off only number you can read is 13 which I believe is the spline number.