Montauk and a Yamaha 60 Two-stoke-power-cycle

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Author Topic:   Montauk and a Yamaha 60 Two-stoke-power-cycle

adaco posted 01-06-2014 03:40 AM ET (US)
I have an older Montauk, with a Yamaha 60 two-stroke-power-cycle outboard engine. There will be one or two persons on the boat. What diameter and pitch should I be looking at in a new propeller? And what is the benefit of cupping? Any suggestions would be much appreciated.
adaco posted 01-06-2014 04:14 AM ET (US)
Just to add: I use the boat mainly to run between saltwater fishing locations, and related cruising. I would be looking at an aluminum 3 blade prop.
Tom W Clark posted 01-06-2014 07:03 PM ET (US)
It depends what year your yamaha 60 is. I believe Yamaha changed the gear ration in 1991 or 1992.
Cupping allows a propeller to ventilate less and "grip" better. All large (40 HP and up) outboard propellers made in the last 30 years are cupped.
adaco posted 01-06-2014 07:44 PM ET (US)
Thanks for clarifying that Tom.
Regarding my motor, it is a 1998 Yamaha Enduro 60,and the Owners Manual lists the gear ratio for that model as 2.33 (28/12).
Tom W Clark posted 01-06-2014 08:24 PM ET (US)
Well, I think it is a mistake to limit yourself to an aluminum propeller, but if you want aluminum *and* you want a Yamaha branded prop, then you want the 13-1/4" x 17" Aluminum, part # 6E5-45945-01-EL
adaco posted 01-06-2014 09:51 PM ET (US)
I live in West Vancouver. In years past with the presence of small logs and such in the water, it was often said that an aluminum propeller could better absorb some of the impact of hitting such things. Whether that was true or not, in reality there simply is not as much likelihood of hitting a log these days. So, I would be open to any alternative materials or types you might suggest. Thanks again, Tom, for the information.
jimh posted 01-07-2014 10:38 AM ET (US)
If an aluminum propeller strikes any sort of underwater object there will usually be damage to the blade or blades, and a repair by a propeller shop will be necessary. A stainless steel propeller can often tolerate impact with objects like wood or bottomland with negligible damage that can be smoothed out with a few strokes of file.

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Author	Topic: Montauk and a Yamaha 60 Two-stoke-power-cycle
adaco	posted 01-06-2014 03:40 AM ET (US) I have an older Montauk, with a Yamaha 60 two-stroke-power-cycle outboard engine. There will be one or two persons on the boat. What diameter and pitch should I be looking at in a new propeller? And what is the benefit of cupping? Any suggestions would be much appreciated.
adaco	posted 01-06-2014 04:14 AM ET (US) Just to add: I use the boat mainly to run between saltwater fishing locations, and related cruising. I would be looking at an aluminum 3 blade prop.
Tom W Clark	posted 01-06-2014 07:03 PM ET (US) It depends what year your yamaha 60 is. I believe Yamaha changed the gear ration in 1991 or 1992. Cupping allows a propeller to ventilate less and "grip" better. All large (40 HP and up) outboard propellers made in the last 30 years are cupped.
adaco	posted 01-06-2014 07:44 PM ET (US) Thanks for clarifying that Tom. Regarding my motor, it is a 1998 Yamaha Enduro 60,and the Owners Manual lists the gear ratio for that model as 2.33 (28/12).
Tom W Clark	posted 01-06-2014 08:24 PM ET (US) Well, I think it is a mistake to limit yourself to an aluminum propeller, but if you want aluminum and you want a Yamaha branded prop, then you want the 13-1/4" x 17" Aluminum, part # 6E5-45945-01-EL
adaco	posted 01-06-2014 09:51 PM ET (US) I live in West Vancouver. In years past with the presence of small logs and such in the water, it was often said that an aluminum propeller could better absorb some of the impact of hitting such things. Whether that was true or not, in reality there simply is not as much likelihood of hitting a log these days. So, I would be open to any alternative materials or types you might suggest. Thanks again, Tom, for the information.
jimh	posted 01-07-2014 10:38 AM ET (US) If an aluminum propeller strikes any sort of underwater object there will usually be damage to the blade or blades, and a repair by a propeller shop will be necessary. A stainless steel propeller can often tolerate impact with objects like wood or bottomland with negligible damage that can be smoothed out with a few strokes of file.