1986 johnson 90 hp seahorse..going to 5krpm full throttle ok ?

lmuss53

Lieutenant Junior Grade
Joined
Sep 9, 2008
Messages
1,227
Re: 1986 johnson 90 hp seahorse..going to 5krpm full throttle ok ?

That will be a 13 3/4 (inch diameter) X 13 (pitch). I buy stock aluminum props on ebay and then sell my old one on ebay, the result is I usually break about even on the prop exchange. You can also get a prop repitched for about half the cost of a new one. I am not sure if you can go like from a 17 to a 13, it may be that you can only go one or two steps with a repitch.
 

johnson426

Seaman
Joined
May 11, 2010
Messages
71
Re: 1986 johnson 90 hp seahorse..going to 5krpm full throttle ok ?

hey guys, I took my boat out today and had my gps on the boat and looks like im hitting about 30mph at full throttle at 5100 rpm with the motor trimmed all the way down to the last hole
 

johnson426

Seaman
Joined
May 11, 2010
Messages
71
Re: 1986 johnson 90 hp seahorse..going to 5krpm full throttle ok ?

is that where I should be at or be going higher ?
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: 1986 johnson 90 hp seahorse..going to 5krpm full throttle ok ?

You would like to see 5800 RPM at WOT with your average load.
 
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