Re: Koban Battery Ignition Commutator

[sputnik16335]

quote kees:

quote sputnik16335:

Hi all-

I’m not sure I was successful posting this a day or two ago. Apologies if this is a duplicate.

I also posted this on another forum but I thought I’d try it here also.

I’m trying to ready my 1915 battery-ignition Koban for a test run. I still haven’t found a correct flywheel, but I did find a very close substitute at a local steam-and-gas engine show. It’s an iron open flywheel 13 inches in diameter, and has a hub big enough to machine it to fit the Koban crankshaft. I think it will do until I can find a correct one, or a reproduction.

The problem is that I will still need to produce a commutator ring to fit to the flywheel. I think it should be similar to one I made for an upright Maytag, but I still need to know how it is attached to the flywheel.

Any advice, pictures, etc. would be greatly appreciated.

Thanks,
Rich Roberts

.
If you don’t have an original flywheel then…….
this is what you need on your substitute 😮

AT LEAST, THIS MUST BE THE ANSWER ON YOUR QUESTION,
I HOPE / THINK

btw. you need the original timer lever as well of course,
or you have to adapt a similar one from another rowboat motor
see attached picture
.

Haven’t been able to check the forum for a while, so I’m just getting back into it.

I think this explains things. I was thinking my timing lever contact was a wiper for a commutator ring. Your picture looks like the flywheel just has a cam on it that closes contacts on the timer lever. It just looks like my lever only has one side of the contact set. Should be easy to fabricate the other side.

Thanks. I really have to rethink things now…

Rich R