by Chris
(Whitehaven England)
starts first time and runs smooth, revs up to 3500 with no load but in gear with load goes up to 2000 but will not go higher, even though the throttle has more movement available. have changed all filters, taken off turbo and it runs freely without any noises or impeller play. Cleaned exhaust elbow. Lifted out and cleaned and anti fouled hull. Anyone any ideas