50 hp Johnson prop

terrymadtown

Cadet
Joined
Aug 1, 2010
Messages
6
Hi
I'm looking for a prop for a 2002 4 stroke Johnson motor used on a 20' pontoon boat. Right now the motor max RPM is 5200. I would like a little more power but it's not a requirement. I would like stainless steel but that is not a requirement either. I'm not sure what prop to get or where to look to buy it.
Any help?
Thank you.
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: 50 hp Johnson prop

If your WOT RPM is 5200, you are right about where you want to be. What speed are you achieving at 5200 and what is the current size/pitch?
 

terrymadtown

Cadet
Joined
Aug 1, 2010
Messages
6
Re: 50 hp Johnson prop

The size is 11 1/2 with a pitch of 15. It tops out at 5200 rpm. I read that I can go to 5900 rpm. What would the best pitch to use to get more speed?
Is a 4 blade prop better than a 3 blade prop?
Thank you
 
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