I have a Thunder Tiger Pro 46 that runs like a top at idle and full throttle and the transition is smooth. The problem is it is really difficult to start. Bring it in and gas up and same thing, it is still tough to get started. The "experts" in the club have played with it but can't get it to start like most of the others do...with a flip or two of the chicken stick. It takes 30 seconds or more with the electric starter to get it going. And often it floods and we have to pull the glow plug to clear it and try again. Once started, it purrs like a cat.