1997 35 Johnson prop

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duckhunter55

Petty Officer 3rd Class
Joined
Oct 13, 2007
Messages
94
Just bought the above motor. RUns great. THe motor came with a 10 x 12 prop. I have the motor on a 16 ft. aluminum, riveted boat. Boat is very light, no console, no flooring, just 2 batteries and me, 270lbs. I know all about the effects of pitch and rpms, but i broke my tiny tach and dont want to by a new one just for this, so what would you guys suggest, Im thinking about a 16p prop. because i know this motor has got to be way overreving at full throttle. BOat probly weighs 400-500lbs with me and batts. thanks luke
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,513
Re: 1997 35 Johnson prop

I know all about the effects of pitch and rpms, but i broke my tiny tach and dont want to by a new one
Click to expand...

Ayuh,...

Then you probably know that nobody here wants to answer your question based on pure speculation either....

It'd be kinda like driving while Blind,.. in the Dark....
 
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steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 1997 35 Johnson prop

Your motor is free reving can run comfortably at 5,800 rpm.
I think you have more weight than you think; boat about 300-350,motor 150,
you 270,batteries 80,6 gal gas 48.Probably oars and an anchor I figure your total is around 900-1000.I would run it as is until you can get a tach.
Just try to be aware of the rpm. a 12" is slightly on the light side of mid range props and at 900lbs I wouldn't really call the boat light.Perhaps you could borrow a shop tach.Instead of buying a prop get a tach so you know exactly where your at.Don't forget motor height affects performance.
 
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