what type of mileage can you expect to average,and are these late models more reliable than the early 550 engine,thanks for any input. :fluffy:

Mileage is usually less than stellar because it is usually mashed to the bar in most conditions. When it gets warm out it will be worse. An old XCF going down any lake would go from about 75 on the speedo to 65 just because of heat build up in the motor.