Prop pitch question

TRAILN

Petty Officer 2nd Class
Joined
Jul 28, 2011
Messages
121
Hi,
I've got an '86 Johnson 60 fiberglass fish/ski boat. Prop is 13 1/4 x 17" pitch. WOT is 35mph 5600 rpm. Can anyone give me a top speed guestimate and RPM on switching to 19" pitch?

Also. Rarely I've got 4 adults in the boat but it runs like a slug when I do. Will 19 pitch prop help or make it worse when fully loaded?

Thanks!
 

BaileysBoat

Senior Chief Petty Officer
Joined
Sep 29, 2008
Messages
716
Re: Prop pitch question

19 pitch will not work. Going to lose rpm and hole shot. 35 mph sounds right on the money for a 60 hp on a 4 seater glass boat.
 

SparkieBoat

Captain
Joined
Aug 17, 2009
Messages
3,643
Re: Prop pitch question

yep you got all your gonna get with that motor..get a 70 or 115 if you want to go faster
 

TRAILN

Petty Officer 2nd Class
Joined
Jul 28, 2011
Messages
121
Re: Prop pitch question

Thanks guys.
I was thinking of modding it. Drilling holes for the exhaust to make up for the lack of holeshot performance.
 

SparkieBoat

Captain
Joined
Aug 17, 2009
Messages
3,643
Re: Prop pitch question

a set of trim tabs will help bunches on your hole shot.
 
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