3 blade verses 4

dreamchaser

Petty Officer 1st Class
Joined
Aug 31, 2006
Messages
228
Greetins All, My 1994 120 johnson 2stroke has a 19p #389510 ss prop on it now, WOT comes out at 5400 , which accordin to info posted on here is a little shy of the max for this motor,... Im wonderin if my 4 blade 19p solas aluminum will give any more rpm? btw the 4 blade i like , it holds me on plane at a lot lower rpm range which is nice for rough water cruisin . thks..Leo
 

kp913

Seaman
Joined
Mar 21, 2007
Messages
57
Re: 3 blade verses 4

I would imagine you would turn a little less RPM due to the same pitch but having an extra blade. Unless the diameter was dramatically different. You may not be too far off because of the flex the aluminum prop will have while under power, but I don't think you will see the RPMs that you want.


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