TOHATSU 40 Service Manual page 44

Carburetor Synchronization
Engine ignition timing must be properly adjusted
before synchronizing the carburetors.
1. Remove the air silencer cover.
2. Disconnect ignition timing link (1) and throttle link (2) so
1
throttle lever roller (3) does not make contact with throttle
cam (4).
3. Adjust the length of each carburetor throttle link rod (5) to
2
specification :
Model
40 / 50
60 / 70
80 / 90 / 115 / 120 / 140
4. Reconnect timing link (1).
1
5. Turn all throttle lever screws (6) clockwise to loosen. The
3
throttle butterfly valves should return to a fully closed
position.
6. Loosen throttle stop screw (7) on top carburetor (middle
4
carburetor on models 60 and 70) so it does not make
contact with throttle lever (8). The throttle butterfly valve should
return to a fully closed position.
7. Starting with the second carburetor from the top of the
5
engine, apply light upward pressure to linkage tab (9) and
turn throttle lever screw (6) counterclockwise to tighten the throttle
lever. Repeat this step for each remaining carburetor, working
toward the bottom carburetor.
3-/ 4-Cylinder
GENERAL SERVICE INFORMATION
NOTE
Length
5
Link
3.54 in [90 mm]
3.81 in [97 mm]
4.33 in [110 mm]
T1088
T1089
T1090
T1091
T1092
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