There are several different brands of engines that are made by the same company.

SC, ASP, & Magnum are all identical.

If you want to read a review of this engine, go to www.justengines.unseen.org and read the review on the ASP 91

I have one and it is a friendly easy to adjust engine. It has power compariable to the OS FS91 Surpass I engine.

Treat it as you have your 2 stroke engines. Except if you get it too lean, it will back fire, tear up the spinner and or throw the prop off. Always have a smoke trail.

Enjoy,

Jim