1979 115 mariner bought with no prop

R

riskybusiness

Cadet
Joined
Jul 11, 2013
Messages
10
o guys I have recently bought a 1979 115 mariner It had no prop when I bought it. I have been looking on craigslidt for a prop for it and I am not sure what is right. I have been told it needs a 19 pitch and I have been told the yamaha props will fit. Oh and It will be pushing a 19 foot 1972 browning/aerocraft tri hull. I know prop questions are like gearing questions when it comes to cars so I know this might be one of those opinion type threads but I just want to try to get the right set up the first time
 
etracer68

etracer68

Ensign
Joined
Oct 11, 2009
Messages
906
Re: 1979 115 mariner bought with no prop

What was on the boat before, and how did it work out. We need WOT rpm and gps speed, with a light load. I would say an 17 or 19 pitch. Im not sure about the yamie props. Here on IBoats you can get a new one Solas, for a good price to your door.
 
S

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 1979 115 mariner bought with no prop

It appears the 78-83 Yamaha are the same number in the same pitch but the list of props is much shorter perhaps the Yamaha is a different gear ratio. Numerically lower? Perhaps someone knows what the gear ratio is.A 79 18 footer is about 1600 lbs.
I think a 19 footer could be about 1800 lbs If I had to guess I wouldn't go over a 17".
 
jimmbo

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
12,961
Re: 1979 115 mariner bought with no prop

17 max, you might have to go with a 15
 
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