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Re: Bo Jest: power questions, engine type

Posted: Sun Jul 14, 2013 9:59 am
by scout
i wanted to revive this thread to ask a quick question....

those of you with the yamaha 9.9 high thrust: which shaft length are you using -- the 20 or 25?

my builder is suggesting going 12 - 15 hp for the bo jest for push against current, but as tom as said, there's enough umph left in the 9.9 if necessary :)

Re: Bo Jest: power questions, engine type

Posted: Sat Mar 30, 2019 11:51 am
by chugalug
:D What did you end up using?I got a Yamaha 9.9 high-thrust to put on my bo-jest.25 inch shaft.hopefully I will launch this summer. :D

Re: Bo Jest: power questions, engine type

Posted: Sat Mar 30, 2019 12:01 pm
by Bill Edmundson
The 9.9 will be fine. You hull speed is about 6MPH. If the current is 6, you aren't going any place. You won't over power it. Watching the current and avoiding it is far more effective than HP. I used to paddle up rapids watching and knowing how the currents worked.

Bill

Re: Bo Jest: power questions, engine type

Posted: Sat Mar 30, 2019 12:09 pm
by chugalug
:D Thanks ,Bill.Was just curious on the other fella,s pick. :D

Re: Bo Jest: power questions, engine type

Posted: Sat Mar 30, 2019 1:23 pm
by Bill Edmundson
Chug

More hp will help into the wind. For current stay to the inside of river bends going upstream, outside coming down. :wink:

Bill

Re: Bo Jest: power questions, engine type

Posted: Sat Mar 30, 2019 3:59 pm
by chugalug
Ahh Hmmm.,Bill. most of the little rivers up here have a channel so until the weeds grow up or the memory goes,I'll get grounded. :lol:
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sorry for the hijack -scout :D