I'm just starting my third gallon of gasoline in my TOC/3MM 53. I really like the MSC 22x8 props for my 50cc size engines. It's a super wide blade; they're light, put out a lot of thrust, and brake better than any I've tried. This is a wide plank that really loads. I get 6800+ rpm with this set-up. That matches and exceeds all of my other 50 cc engines.