Johnson 90 Prop question

Joined
Oct 19, 2004
Messages
7
I have a 2000 Johnson 90 and I'm going to use it for pulling ship's lines and oil booms. I've got to replace the prop anyways and was wondering what would be a good pulling prop for that motor.
 

walleyehed

Admiral
Joined
Jun 29, 2003
Messages
6,767
Re: Johnson 90 Prop question

Gotta know what speeds you'll be operating at and eng. load conditions.<br />Are we talking high throttle settings at walking speed???
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Johnson 90 Prop question

It all depends on the actual load but just guessing I would start with a prop about 4" less in pitch than the proper one for your normal use. IE -- if you normally use a 19 and are set up about 5800 -- 6000 then to pull what we perceive to be a very heavy load, I'd look at a 15.
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Johnson 90 Prop question

Sorry Kenny -- you type faster than me...
 

walleyehed

Admiral
Joined
Jun 29, 2003
Messages
6,767
Re: Johnson 90 Prop question

No, I started typing 3 minutes after it was posted....just takes me longer to "proof-read"... :D
 
Joined
Oct 19, 2004
Messages
7
Re: Johnson 90 Prop question

I'll be towing boom and lines at low speeds 7 knots or less, but I'll need to run to the jobs at a good speed. I've done it a bunch with stock props, but I wouldn't mind giving up a little top end for some more pull if I won't overload the motor.
 
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