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Old 03-15-2014   #1
Tabernash, Colorado
Paddling Since: 1990
Join Date: May 2009
Posts: 15
Outboard Size?

I looking to get some specifics on what size outboard I need to push 6 rafts.
I've been on a trip that used a 15hp 2 stroke on Deso and that seemed very sufficient. I've searched past threads and seems like most recommendations come from personal experience. Is there any some what scientific way to figure out the best size?


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Old 03-16-2014   #2
caverdan's Avatar
C. Springs, Colorado
Join Date: Aug 2004
Posts: 1,443
I'm not scientific, but ....... I would suggest not going smaller than 5hp. I have a 5hp 4 stroke Honda that will push a 10 boat floatilla down river (but not with a strong head wind). I also have an 8hp 2 stroke Johnson that does twice the job and offers better steering control due to being almost twice the power. I'm keeping the Honda for the future, in case I come across a river that has banned 2 strokes. If I was to buy another 4 stroker, it would be at least 8hp. Those three extra pony's are worth the extra money. Hope this helps.

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Old 03-17-2014   #3
Prattville, Alabama
Paddling Since: 2005
Join Date: Mar 2013
Posts: 60
Prop size and number of blade and pitch matter too

First off I love my Tohatsu 9.8 4 stroke. I suggest you get the highest HP you can in the weight range you are looking at. The Tohatsu is supper quiet is excellent on fuel and weighs in at 81 lbs. It also has at least 4 different props available. The standard prop (8.5 d x 8 pitch 3 - blade) is actually a good compromise for up and down river work of med weight raft or cat. The 3- blade 10 pitch prop they make works great downriver with a loaded cat. My favorite prop for pulling multiple boats though is there 4- blade prop for heavy loads, which is also there smallest diameter prop at just under 8".
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