Thanks T_driver.
I found this:
http://www.rcuniverse.com/product_gu...?engine_id=419
And it seems it is the US Engines 41cc. Now to build a test stand and get it running.
Oh, I guess I still need to figure out the kill switch. If there is no switch hooked up at all, is it default 'on' or 'off'?
Thanks
Paul