I Have a question on my 2003 Stingray 180 lx boat. The mercruiser 3.0 135 hp Sterndrive motor started jumping rpm at full throttle, RPMS will drop from 4700 to 4000, then be ok for another 500 feet then jump again, Speed of 39- 42 miles an hr. But when im traveling 25- 30 miles per hour its...
