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Author Topic:   Prop size for 115 Yamaha on 16'7
newp posted 12-22-2002 01:59 AM ET (US)   Profile for newp   Send Email to newp  
Last week I mounted a yamaha 115 on my 16'7 whaler. Instead of tinkering with different props I was wondering if anyone knows the most suitable prop for this engine and hull. I had custom bracket made for the transom, and the dealership recommend me to cut underneath the well, pull out foam, thru bolt bottom bolts, and fiberglass over the foam so no water will intrude, in which I did. The saft is 20 inches. Hope someone can help me with the right prop.
newp posted 12-22-2002 02:08 AM ET (US)     Profile for newp  Send Email to newp     
Sorry,spelling error Line 6
- shaft
PSW posted 12-22-2002 03:16 PM ET (US)     Profile for PSW  Send Email to PSW     
Look at the threads from a few weeks back on my prop selection for a Merc 115 on a Montauk. I tested 6 different SS props before ending up with a 21" Rapture by Michigan Wheel. I do not no what the gear ratio is on your 115 so you may want to find out what it is first. Yamaha makes good props so you may want to look at one of theirs.


jimh posted 12-23-2002 07:56 PM ET (US)     Profile for jimh  Send Email to jimh     
[Administrative post]
fbg111 posted 12-24-2002 02:30 AM ET (US)     Profile for fbg111  Send Email to fbg111     
I am in the process of repowering my '88 Montauk too, but I thought the max rated horsepower is 100. How have you both put 115's on it? Is that legal? I would like to do that to if possible.
Bigshot posted 12-26-2002 09:44 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Tons of topics on overpowering a montauk. Do a search. We have discussed the legalities and insurability, etc many many times.
eaglet1122 posted 01-05-2003 11:40 PM ET (US)     Profile for eaglet1122  Send Email to eaglet1122     
I have a 96 17' OR w/ a 115 yammy. I just went from a 17" to a 19" SS and saw a world of diffrence[29 mph to 38mph] . Hope that helps. Stan

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