TOHATSU 40 Service Manual page 38

Align flat surface (6) of crankcase mold boss with calibration
17
marks on set ring. Perform the adjustment with set ring
pushed slightly in the direction of arrow.
5. Return advancer arm (4) to the maximum speed position
18
(wide open throttle) and adjust length of high speed side
stopper (3) so it contacts the advancer arm.
Ignition Timing Adjustment
Models 60C / 70C
1. Adjust ignition timing link (1), throttle link (2), and high
19
speed side stopper (3) to specification.
Ignition Timing
Model
1
Link
60C 5.75 in [146 mm]
70C 5.75 in [146 mm]
2. Place advancer arm (4) in the maximum speed position
20
(wide open throttle) and make sure the carburetor throttle is
fully open. If throttle is not fully open, make fine adjustments using
throttle link (2).
3. With the advancer arm still in the maximum speed position
21
(wide open throttle), set the ignition timing to specification by
adjusting the throttle cam stopper (5) on the air silencer (Models 60C
and 70C).
Model
60C
70C
The rubber damper must be installed on stopper
when making the adjustment on 60C and 70C.
3-/ 4-Cylinder
GENERAL SERVICE INFORMATION
NOTE
Length
Throttle High Speed
2
Link stopper
5.04 in [128 mm] 0.87 in [22 mm]
5.04 in [128 mm] 0.55 in [14 mm]
Ignition Timing - Full Throttle
BTDC 17.5˚ ± 1˚
BTDC 17.5˚ ± 1˚
NOTE
3
T1079
T1080
T1074
T1075
T1076
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