2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 64Get this manual
Periodic checks and adjustments
12Check the throttle cable for smooth operation and adjust the cable length, if necessary, repeating steps 110
Adjusting the throttle link and throttle cable operation (without stop bolt)
NOTE: Be sure to synchronize the throttle valves before adjusting the throttle link For synchronizing procedures, see Chapter 4, "Synchronizing the throttle valve 1Loosen the locknut 1, remove the clip 2, and then disconnect the throttle cable joint 3
9Place the throttle cam against the fully closed stopper f, and check that there is minimum clearance of approximately 1.0 mm (0.04 in)