TOHATSU 40 Service Manual page 36

Ignition Timing Adjustment
Models 40D2 / 50D2
1. Adjust ignition timing link (1) and throttle link (2) to
7
specified length.
Model
Ignition Timing Link
40D2 3.98 in [101 mm]
50D2 3.86 in [98 mm]
2. Place advancer arm (3) in the maximum speed position
8
(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. Adjust ignition timing link (1) so ignition timing at full
7
throttle is matches the following specifications:
Model
40D2
50D2
Align flat surface (4) of crankcase mold boss with
9
calibration marks on set ring.
4. Place advancer arm (3) in the minimum speed position
10
(throttle fully closed) and adjust low speed side stopper (5)
so ignition timing matches the following specifications:
Model
40D2
50D2
Align flat surface (4) of crankcase mold boss with calibration
11
marks on set ring.
3-/ 4-Cylinder
GENERAL SERVICE INFORMATION
Length
1
Throttle Link
4.53 in [115 mm]
4.53 in [115 mm]
Ignition Timing - Full Throttle
BTDC 18˚ ± 1˚
BTDC 20˚ ± 1˚
NOTE
Ignition Timing - Throttle Closed
ATDC 3˚ ± 1˚
ATDC 3˚ ± 1˚
NOTE
2
T1069
T1070
T1071
T1072
T1073
2-27