The difference is----??

[RichBKK]

Am dropping down from a 10x14 prop to a 13 pitch prop due to carrying more weight in the boat.. I'm checking out a 10 1/8 x 13 pitch and 10 3/8 x 13 pitch.. Both props are by Turning Point..

The 10 1/8 has obvious cupping on edge of the blades.. the 10 3/8 has basically no cupping but "wider blades" and more rake (to my eye)..

What to expect from either of them, their "plus'es and minus'es".. Advantage of one over the other.. Disadvantage of one over the other..

Engine: 2010 Evinrude 30hp ETEC..
Boat: 1980 14' Mirrocraft..

 

[steelespike]

Re: The difference is----??

Can't help much on the individual props.Usually a cupped prop is considered to act like a 1" higher pitch.
Of course it should be less likely to ventilate and should produce good slip numbers.
Turning point props are usually considered to be aggressive.Are you able to test these props or are you buying?
Before making a prop change you should get us your present wot rpm and gps speed lightly loaded and typical weight.
What is the dry weight of the Mirrorcraft? Or what model?All up weight?
Etec tests on similar slightly larger 16' boats with an all up weight of about 900-1000 lbs run 10.3 X 12 BRP al props
5600 - 6000 rpm. with speeds of 27-31 mph.