"Prop Wizard"

The very first prop to come up after I put my info is the exact prop I have 15 1/4 X 15 And I have tryed a few different props and feel this is the right prop, been using it for 5 years ;)
 
Everyones needs are different, This is goodto get you close, you might have to change a size one way or the other.
Most here run 17 pitch, I have one on mine now, but I like the get up and go out the hole that the 15 gives me, I carry a lot of weight, so top end is not as important to me.
 
This may sound dumb but how do I determine the prop I have? I can measure the diameter I suppose, but the pitch? Is it imprinted somewhere? I looked on the fins and saw no engravings that I could find.

As you know I just bought the boat and they guy didn't know what specs the prop had, so I just wonder if I need to think about a different prop or not? There aren't any niticeable issues really just curious.

It's a Yamaha 150 and currently WOT, trimmed well on flat water it runs to about 5200 rpm and 41-42 mph. He said his preferred cruising speed was about 4000 rpm which is about 29 mph or so.

That wizard says max WOT is 5500 rpm, so maybe I am in a good spot already and should leave the prop alone and just buy other stuff ;D ;D
 
It's a Yamaha 150 and currently WOT, trimmed well on flat water it runs to about 5200 rpm and 41-42 mph. He said his preferred cruising speed was about 4000 rpm which is about 29 mph or so.
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Those are pretty much my numbers to a T. I don't remember my diameter but I definitely have a 17 pitch prop on my V-21 with Yamaha 150 2 stroker...

I think you are good ;)
 
Blue_Runner said:
Those are pretty much my numbers to a T.  I don't remember my diameter but I definitely have a 17 pitch prop on my V-21 with Yamaha 150 2 stroker...

I think you are good  ;)
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Cool thanks Blue! I thought I liked the way it run as is just wanted to make sure I was near the "sweet spot" so to speak.
 
Some props have numbers written on the end where the nut holds it on. Then others have it on the side near the blades....
 
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