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Author Topic:   prop for 15' SS
ztagator posted 08-24-2003 07:27 AM ET (US)   Profile for ztagator   Send Email to ztagator  
I have a 15' SS with a 60 hp Johnson and was wanting some info on what size prop to buy. If anyone has same set-up, let me know which prop is working for you.
Bigshot posted 08-25-2003 01:45 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
19" pitch should do you unless you run a heavy load.
where2 posted 08-26-2003 01:09 PM ET (US)     Profile for where2  Send Email to where2     
I'd go with a 17" pitch with only 60Hp, unless it is the 3 cylinder version. I have both a 17" (Aluminum), and a 19" (Stainless) to use with the 1985 70Hp on my 15' Sport. If you want to bring your boat up and try either, drop me an E-mail. I'm in North Palm Beach...
Bigshot posted 08-26-2003 01:44 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I assume it is the 3cyl which is basically the same hp as your 1985 70 being prop rated. If a 2cyl I would still run the 19" SS because that is what I did. I had a 1984 60hp and ran the 11.25?x19" SS OMC prop and she would just about hit her redline of 6k. Reason it can swing a 19" is diameter is so small. That 15 would keep up with a 70hp.
ztagator posted 08-26-2003 09:19 PM ET (US)     Profile for ztagator  Send Email to ztagator     
The engine is a 3 cyl and currently am running a 13 1/4 x 17 and at WOT hits 5500 rpm's. I want a stainless prop and am not sure which brand, size, or pitch to go with?
Bigshot posted 08-26-2003 09:29 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Hold up....5500 is 500 below redline. I would not do the 19" yet. What I would do is post back at what height the engine is above the transom and we'll go from there. You probably have to jack the engine up some and still run the 17". Your redline is 6k and if we can get you there with a 17" you will feel a HUGE difference.
ztagator posted 08-26-2003 09:33 PM ET (US)     Profile for ztagator  Send Email to ztagator     
My cavitation plate with engine trimmed all the way down is level with the bottom of boat.
where2 posted 08-27-2003 07:48 AM ET (US)     Profile for where2  Send Email to where2     
Bigshot makes a good point, I'm swinging a 13-1/4"x19SS or the 13-1/4"x17" Aluminum. That diameter change makes a great deal of difference. Mine are certainly not exotics. The SS is an OMC off the shelf from 1985, recupped about 5 years back. The Aluminum is a Michigan, roughly the same vintage and was recupped about the same time. Neither is new technology, that's for sure.
ztagator posted 08-27-2003 09:56 AM ET (US)     Profile for ztagator  Send Email to ztagator     
Would it be beneficial to move the engine up? How many notches? What is involved with moving up engine, I assume reuse the top holes and redrill new bottom holes? What do you use to patch holes in transom? Sorry for all the questions guys, this isnt my forte,but ask me to put a golf ball somewhere, now thats easy.

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