caiman
I have a US41 inverted in my G-Shark. The only way I can start it is with my Dynatron on a Miller Geared starter with 24 V! You would have to convert to CH or similar ignition to hand start this little beast. It does run very well once started. I took off the spring starter because it did not always start the engine and I felt it was just added weight, the engine runs better without it.
The ignition and the starter cost about the same - so your choice is a toss-up.

Check out http://www.quiknet.com/~pheller

Phil

P.S. I do have an extra Magneto coil If you think that would help - although I doubt it! it's yours for $25 plus postage.