Honda 40HP prop

[RAD]

I am hanging my head in shame, 4 years and a decent looking prop, 1 decision = a nackered prop.

How do I measure which prop I want. What measurements do I take to work out which one we have at the moment, ie change like for like.

thanks

[jyasaki]

Take the prop off, and you should [hopefully] find markings to indicate diameter (Honda 40 has a 3.25" gearcase, so something less than 12" diameter, I'd guess), and pitch whole number, likely 8 to 15". It will probably be marked similar to "10.75 x 11" which means a 10-3/4" diameter with a 11" pitch.

Your prop will be determined by: the diameter and spline count of the prop shaft (Honda is 13 spline, I think), the clearance between the prop shaft centerline and the bottom of the anti-ventilation plate, and the pitch (selected by the max rpm your motor will turn it at WOT.)

Hope this helps;

jky