I've spent some time bouncing back and forth on the idea of getting early 2000s 2 strokes or a slightly newer 4-tec. I think im well versed on 2 strokes but don't know what to look for on a 4 stroke. I'm planning to look at an 07 gtx 155 with 140 hours. Looks to be in excellent condition with the exception of some larger-than-normal rash on the hood. "New wear ring, impeller, pump assembly". What should I look for when checking it out?