T-Pain Is On A Boat: [Electric Boats] Re: Torqeedo prop on Minnkota 30?

Tuesday, July 28, 2009

[Electric Boats] Re: Torqeedo prop on Minnkota 30?

It is a MinnKota Endura 30.

The prop that worked best was a Motorguide Tour Series Machete III Tabered Hub 3-Blade Propeller Kit MGA089G.

I belt sanded the motor end of the hub until it it would fit the MinnKota.

To turn down the OD of the prop, I mounted a 3/8 bolt vertically in a large vise and stuck the prop on the bolt. I then positioned an electric drill with a cylindrical wood rasp vertically alongside in a smaller vise, at the necesary distance to trim a small amount from the ends of the blades. I turned the drill on and rotated the blades by hand through the rotating rasp. The rasp burns through the blades, which are nylon I believe, with ease. You can clean up the blade ends with coarse sandpaper or a wood rasp afterwards.

Because I have a canal in back of my house, it was easy to put the prop on the motor and the motor on the boat for a GPS run after removing each increment. I stopped cutting when the last increment removed didn't make any difference.

I'll see if I can post a couple of pics.

John Casperson

--- In electricboats@yahoogroups.com, "nsimms" <nsimms@...> wrote:
>
> Thanks for the reply, John.
>
> Not sure I understand what you mean when you say "turning it down about 1/8 inch at a time until you quit gaining speed." Also, what size/model three blade prop?
>
> Are you using a Minn Kota 30?
>
> Thanks!
>
> Neil
>
> --- In electricboats@yahoogroups.com, "john_casperson" <john_casperson@> wrote:
> >
> > Fairing the downshaft will help.
> > Installing an anticavitation plate coupled with running the motor shallower will help.
> > Installing a three blade prop and turning it down about 1/8 inch at a time until you quit gaining speed will help.
> > My Prindle 16 achieves 4.3 mph by GPS with these changes.
> >
> > John Casperson
> >
> >
> >
>