ok so so far iv hade 3 diff kinds of engine, 1 .25 force, 3 .28 force, and 1 .28 big red .. my question in this is , is it normal that the .25 hase more resistance on the crank then the other .28 i hade n tryed b4 ??? the engines i use atm is the .25 and the .28 big red .. they both start up 1-3...