Suzuki outboard motors 1988 2003 repair manual., Page 47Get this manual
MAINTENANCE 3-31 The engine rpm at trolling speed has been factory set at approximately 700 rpmThe trolling speed varies depending on boat type, weather conditions, propeller types and other variablesAdjust the trolling speed with the idle speed adjusting switch to obtain the desired engine speedAdvance Stop MechanismWhen closing the throttle valve fully, an idle switch is "ON" in conjunction with the carburetor and regardless of the engine rpm, the trolling ignition timing can be obtainedTherefore, by returning the throttle valve to its fully closed position during high speed travel, the boat's speed can be decreased suddenlyCARBURETOR LINKAGE
See Figures 80 and
Check the throttle linkage rod (1) to the carburetors Loosen the throttle lever adjusting screws (2) on the, #2, #3 carburetors Lightly push the throttle lever (3) clockwise until the throttle valves are completely closed Tighten the adjusting screws (2) after applying thread locking agent Move the throttle linkage back and forth and check if all the throttle valves are synchronized in the completely closed position Adjust the link rod (1) to an initial length of in (160 mm) measured between the centers of each connector, the connectors must be at the same angle after adjusting Install the link rod (1) onto the anchor pins (3) on the carburetor lever (4) and the throttle control lever (5) Push the throttle control lever (5) counterclockwise until the throttle valves are completely opened Then the clearance between the throttle control lever (5) and the stopper (6) on the crankcase must be zero Readjust the connectors to achieve this clearance Check for freedom of movement in the linkage