The Rato engine takes a long time to get up to proper rpm from a cold start once it finally gets up to speed it is powerful. Never had this with any other engine, Upon the first hour of use on of the electric drive motors started smoking and burned out. I was charged $61.00 for shipping of the new motor even though it was under warranty, I expect parts to be received within 10 days so I will update this review when I do receive the motor.