RE: Large conversion engine source?
Hmmmm, don't ask me why they came out so big. I had trouble uploading them, and then when they did, they came out huge like that...
Anyway, here are a couple of pics of a 58cc Echo. It also came out of a backpack blower, and was an easy conversion. I did this one for Gas/Glow, and it turned a 20 x 10 prop at over 7000 rpms.
Good used backpack blowers are hard to find, but you can buy a new engine from the suppliers for about 220 bucks as I mentioned before. Less than an hours work cutting and dressing it up, add an ignition and a prop hub, an after market muffler, and you're done....
AV8TOR