Bump

 

On a motor that size, there may not be one available. It may be one of those one size fits all. At least that was what I found on my Johnson 15.

 

On my tohastsu the were at least 20 different props to choose from. The 4 blade will push better than a three, but 3 blade is more weedless.

 

So I should stick with the 4 blade, no weeds on my lake

 

a four blade is for increased grip and turning. they are great for a short hole shot. if you want to see all the prop options for your motor go to IBoats.com you won't find a wider selection or a better price on props. I ought to know I bought 3 last year, lol.

 

if you want a smooth running prop I'd try the smallest pitch. but like mentioned before you may only have 2-3 options for that little motor. usually you have to get into a 40 or larger to get a lot of options.

 

I did a little research Mcolt. what is the pitch and diameter on your 4 blade. thru hub exhaust and 7 tooth spline. 4 blades are also known for less vibration over the 3 blades. if you do decide to switch to a 3 blade a 1* pitch increase will be comparable. a 6.5* pitch is about the smallest pitch 3 blade available on those motors. 7.5*,8*,and 9* are typical options but im finding way more options than I had planned. the yamahas have the same 7 tooth spline for all motors from 9.9 to 20hp so there are many choices 3 and 4 blade.

 

Thanks for the info bud, sounds like I'll run the 4 blade until it has had enough and then hit up iboats