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  170 MONTAUK: Speed with 2.5-HP Auxiliary

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Author Topic:   170 MONTAUK: Speed with 2.5-HP Auxiliary
fishin8tor posted 04-02-2010 07:29 PM ET (US)   Profile for fishin8tor   Send Email to fishin8tor  
I am interested in buying a gas trolling motor for my 2005 170 Montauk, but at the same time I want a portable motor for my 10 ft inflatable boat. Due to the weight, I am considering a [Suzuki] 2.5-HP which only weighs 30-lbs and would push the [RIB] to planing speed, but I don't know how fast it'll push the [Boston Whaler 170 MONTAUK. Can someone comment on how fast I could go with the 2.5-HP on the 170 Montauk? Thanks.
handn posted 04-04-2010 01:48 PM ET (US)     Profile for handn  Send Email to handn     
I had a 2.5 Yamaha for my old 11-foot inflatable. It didn't push the inflatable anywhere near planing speed--maybe 6 knots or 8-knots maximum. I have a 9.9-HP Tohatsu on a 12-foot hard bottom inflatable. It will plane the boat with one person aboard and almost plane it with two aboard. My two cent's worth is that you need more horsepower for a satisfactory trolling motor. Even if you are trolling ultra slow speed for Salmon, a 2.5 will not allow you to make any headway against the wind or tide.
muskrat posted 04-07-2010 09:38 PM ET (US)     Profile for muskrat  Send Email to muskrat     
I have a 3.5-hp Yamaha that I used as an emergency kicker on my Montauk. In calm water it was functional. I guess about 6 mph. I never tried it in any notable wind but I don't think it would make any headway in any [head wind] over 10-mph. I would say a 2.5-HP would be useless for trolling but if your main engine fails it may save you a tow assuming your safe destination is downwind.

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