At higher rpm, a synchronizing piston engages the 3rd rocker arm on a high-lift cam (in blue). All 3 rocker arms are locked with each other. The intake valves are open up for an extended length of time to provide additional ability. This results in a superior mixture of electric https://buy4hpoutboardmotor96015.ampedpages.com/new-step-by-step-map-for-used-3-hp-outboard-motor-54315994