Prop choice for 1979 Johnson 35hp

K

Kleinhenz

Cadet
Joined
Dec 30, 2010
Messages
7
My fishing partner just bought a boat that has a 1979 35hp Johnson. The prop is bent and we want to replace it. He says it needs to be a certain "pitch" to get out of the water well and have speed. The old prop says PJ 97 on it. Does that have anything to do with the pitch of the prop? I see no other markings visible. I wanted to buy one on-line but not sure what we should look for. Any suggestions on the best prop for this motor would be greatly appreciated. Thanks,
K :)
 
Cofe

Cofe

Lieutenant Commander
Joined
Apr 23, 2009
Messages
1,883
Re: Prop choice for 1979 Johnson 35hp

The pitch should be stamped on the shaft hub. You may have to remove the propeller and look at the other end.
 
K

Kleinhenz

Cadet
Joined
Dec 30, 2010
Messages
7
Re: Prop choice for 1979 Johnson 35hp

So is the pitch stamped on the prop itself or the shaft? I can't find any other numbers on the prop itself.
 
Cofe

Cofe

Lieutenant Commander
Joined
Apr 23, 2009
Messages
1,883
K

Kleinhenz

Cadet
Joined
Dec 30, 2010
Messages
7
Re: Prop choice for 1979 Johnson 35hp

O.K. that helped they list 4 props for this motor and I have one question. The numbers I did find on the prop say 9 7 the closest match of the props listed on the OMC site was 9&quarter by 7. I don't suspect the quarter inch diameter difference would be a big difference?
 
S

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: Prop choice for 1979 Johnson 35hp

Welcome,you should read the stickies at the top of the page.
I believe the motor came with a 10 1/2" X 11" (diameter X pitch).Pitch is the key number.
According to the chart the 11" is intended for heavy boats or sking.
Not knowing your boat or speed and rpm I would suggest the 11".If it turned out top be a little light you could still use it and just reduce throttle to stay within rpm range.
You should really have a tach.
 
You must log in or register to reply here.
Top