1974 Johnson 135 HP Outboard Motors Service manual, Page 68Get this manual
With easy planing boats, it would be desirable to bring the boat into planing position with full power and then immediately reduce the throttle setting to approximately 3000 rpm (one-hali throttle)BE SURE boat maintains planing attitude at this throttle settingDuring second hour, bring boat into planing attitude and reduce power to 4000 rpm (approximate) or three- quarters throttle (approximate), while maintaining planing attitudeAt intervals during the second hour, apply full power for periods of one to two minutes, returning throttle to original setting (4000 pmthree-quarters throttle) for cooling periodAvoid continuous full throttle operation for extended period during the next few hours