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Question about propell Johnsen 115

B

Balder

Contributing Member
Hello.
I have a Galia 560 Cruiser with 1998 Johnson 115...my question...the propell on the motor is a alu propell 14x17, i also have a new steel propell 13 1/4×19, i have never used this one....what will be the differens betwen this two propels on the boat ?
In my simple head they would be about the same...or :confused:
Thanks
 
Boat speed will likely be the same.-----Boat will take off faster with the 17" pitch.----The difference will be in the full throttle RPM of the engine.-----------Running a motor with the wrong prop can lead to serious damage.-----Even the 17" may be wrong for the boat.
 
Is it correct to say that the 17" pitch is the same as a "lower" gear to start in compare with 19" pitch ? and that it is the pitch i should change to end up with correct VOT rpm ?
And 13 1/4" diam will move a little less water than the 14" diam ?
Will 2" differens in pitch make a bigger differens than the 3/4 difference in diam ?
Sorry about all questions....i just try to understand this :)
 
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