Need help: 2006 50hp Yamaha 2-stroke Prop Question

[trita306]

I have this motor on a 18' PolarKraft that's relatively heavy. It's having some issues getting on plane, motor runs great, rpm is right. Can someone suggest what prop I should try for better results. I am not concerned with top end. Please suggest a diameter and pitch, links would be appreciated also. Thanks all!

 

[Sea Rider]

What's right RPM ? Was that achieved with lightly loaded combo ? Wot revs are needed to check if inside safe min-max wot range. That engine should be revving 5-6 K right ? Without a tach impossible to maximze prop.

Happy Boating

 

[trita306]

By RPM right I meant it holds idle well, and holds WOT without bogging. I have no tach so I couldn't tell you numbers. I want to make sure the right prop is on there first.
Thanks for your response.

 

[Sea Rider]

Sorry, can't dial best prop to suit your boating needs if not counting with a tach, not even having a musician ear to determine wot rpm when engine is roaring. Picking any prop from current use will be a wild guess shot in the air.

Happy Boating

 

[steelespike]

Without your present prop size(under the prop nut) its difficult to tell what you need.
For the health of your motor you really shouldn't change props without a tach. An induction tach will work.
We'll need your present lightly loaded
wot rpm and gps speed.