Hi,

The Macs are easy to convert, especially if you are going to use battery ignition which I recommend for ease of starting, and lighter weight. Yours is probably either a 28 or 32cc. This would be a touch small for your plane I would say. Better find something in the 40 to 50cc range. The engine weight won't be much different, and you could use the extra thrust on that Eagle. Lawnstation has good deals on Poulan chain saws that have engines that are fairly easy to convert.

Good luck,
AV8TOR