Honda Outboards BF40A/BF50A Service Manual, Page 316Get this manual
BF40A-BF50A 7) After adjustment, move the throttle cam to the fully open position and be sure that there is clearance of mm (0.04 in) or less between the carburetor throttle lever and stopper on the No.3 carburetor8) If the clearance is more than mm (0.04 in), readjust by turning the throttle rod pivot9) Adjust the throttle cable, then connect the throttle cable to the throttle arm[1] THROTTLE CAM ROLLER
[2] mm (0.04 in) or less
Throttle Cable Length Adjustment
Adjust the throttle cable length after adjusting the throttle rod length1) Turn the throttle grip to the fully open position and check that the throttle arm contacts the fully open stopper[1] THROTTLE ARM