I wouldn't bother with isolation mounts. Align the shaft and bolt her down solid. If you wind up with a little vibration, loosen the bolts a bit and move it around slightly until you find a sweet spot. Any noise from the motor is going to be of a relatively high frequency which rubber mounts won't absorb much. Fiberglass hulls sometimes resonate with those higher frequencies, but I think wood would tend to dampen it.
You may want to consider an isolated shaft coupler to keep leakage currents off the shaft and prop to minimize corrosion. Another, and probably cheaper method is to insulate the lower bearing(s) from the plate. Some hard plastic shims, washers, and bushings would work.
Jim
--- In electricboats@yahoogroups.com, semicolonsutra <no_reply@...> wrote:
>
> I'm mounting my ME0913 to my wooden sailboat and am using the Thunderstruck gear reduction harness (see link below). I have been advised that using flexible motor mounts is a good idea to reduce the load transmission to the hull--she's an older woodie. Anyway I'm looking at vetus and merequipment among others and all the mounts seem to suggest a minimum weight of say 50 pounds--I assume this is per mount. Since I'm going to use 4 mounts and the ME0913 is about 50 pounds total with all accoutrement that would be only about 12.5 pounds per mount. What should I do? Does anyone have suggestions on motor mounts to buy? Also does anyone know a good chandlery in the SF Bay Area where I might get these (I tried Svendson's and a few others but no one has any in stock). The last question: do I even need them or can I just bolt them to a piece of 1" marine ply bolted to the stringers?
>
> Cheers,
>
> Bradley
>
> links:
> http://www.thunderstruck-ev.com/ts-gear-reduction.html
>
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