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Author Topic:   Using 15-inch Shaft Outboard on 20-inch Transom
Jholmes105 posted 10-17-2014 09:19 AM ET (US)   Profile for Jholmes105   Send Email to Jholmes105  
The transom [on a 1984 Boston Whaler 13-foot boat] is designed for 20-inch-shaft outboard engines. Is there any feasible way of mounting a short shaft or 15-inch shaft outboard engine on a 13-footer [with a 20-inch transom]? I ran across a deal on a newer 20-HP four-cycle. Quick replies greatly appreciated. What about a transom bracket?



dg22 posted 10-17-2014 12:11 PM ET (US)     Profile for dg22  Send Email to dg22     
I would not recommend doing that even if it is a great deal. Even if you put a bracket to set back your motor, there will most likely be issues with the steering, control cables, etc... Plus, if your boat ever fills up with water, you may lose the BW benefit of keeping the engine above the waterline. On top of all that, it won't look good.
jimh posted 10-17-2014 12:36 PM ET (US)     Profile for jimh  Send Email to jimh     
Usually a modern engine with a 15-inch shaft is hard to find. It's odd that you've got one lined up for a 20-inch transom boat.

I also don't recommend trying to make the 15-inch shaft engine work on the 20-inch transom. Leave that 15-inch-shaft engine for some guy whose boat neeeds it. You'll be better with a 20-inch shaft on your boat.

Jholmes105 posted 10-17-2014 07:42 PM ET (US)     Profile for Jholmes105  Send Email to Jholmes105     
Thanks for the replies and suggestions, yeah I guess I will have to pass on the deal as it just may not be the right way to go.

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