4-strokes require special handling.

Mike Hilderbrandt has a brand new Hangar 9 Edge 540 that he powers with a Saito 1.80. "I'm not sure what people mean by special handling," says Mike. "I treat my Saito engines the same as any of my 2-strokes. I try to run all of the fuel out of them at the end of a day of flying to keep them dry and extend bearing life, regardless of the type of engine. Other than that, I fuel, flip and fly."