RE: Prop nuts
gp300:
The majority of the 40-46 size motors have 1/4-28 threads on the crank for a prop nut...just check with the manual which one you need. I have a TT gp.42 - OS 46LA - MDS .40 - Super Tigre 40 and all take the 1/4-28 so that seems to be about the stock size used on most of the 40 sized motors.
Madd_Maxx