View Full Version : Determining Prop Dimensions
Danno
09-13-2006, 08:25 AM
How do I determine the dimensions on my prop (90 hp Honda)? I can't find any numbers on it. I know I need the diameter and the pitch. The diameter is easy to measure. Is there a method to measuring the pitch or do I need a special tool?
Chrome Bumper
09-13-2006, 09:03 AM
My stock aluminum hondas are stamped on the outside by the blade root. A prop shop can measure them but yours should be marked. Did you take it off and check the front and the back? You can get a pretty good idea by setting them next to similiar props of known pitch.
Many are stamped on the inner rear where the exhaust exits, not sure about Honda.
Danno
09-13-2006, 01:05 PM
Nope, haven't taken it off yet (new boat to me). I guess it's time to buy a prop wrench. This prop doesn't allow me to get up much above 5,000 RPM so I want to buy a new prop that will and make this one my backup prop.
Thanks for the tips.
Chrome Bumper
09-13-2006, 01:08 PM
Crescent wrench works. 1 inch pitch change equals 4-500 RPM.
1pump
09-13-2006, 10:21 PM
I just took the prop off of a F200 Yamaha earlier today. It was marked on the back side of the inner hub.