What engine is this?
That is a Skyward engine. It is made by Pico for the Canadian distributor and sold as the Skyward here in Canada.
Its a good strong engine, allbeit a bit heavy, but they run and run well! I have two of the 40's and a full tuned pipe for one.
Clarence Lee did a review on them a while back, got good marks from him. My experience says the same.
Andrew