TOHATSU 40 Service Manual page 40

Ignition Timing Adjustment
Models 80A / 90A
1. Adjust ignition timing link (1) and throttle link (2) to
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specification :
Model
Ignition Timing Link
80A 4.88 in [124 mm]
90A 4.88 in [124 mm]
2. Place advancer arm (3) in the maximum speed position
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(wide open throttle) and make sure the carburetor throttle is
fully open. If throttle is not fully open, make adjustments using
throttle link (2).
3. With the advancer arm at maximum speed (wide open
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throttle), adjust throttle cam stopper (4) (Pre-setting length =
20 mm) on the air silencer to obtain the specified ignition timing at
full throttle:
Model
80A
90A
The rubber damper must be installed on stopper
when making the adjustment.
4. Adjust high speed stopper (5) to specification:
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Model
80A
90A
3-/ 4-Cylinder
GENERAL SERVICE INFORMATION
Length
1
Throttle Link
5.18 in [131.5 mm]
5.18 in [131.5 mm]
Ignition Timing - Full Throttle
BTDC 20° ± 1˚
BTDC 20° ± 1˚
NOTE
Pre-setting Length
High Speed Side Stopper
0.6 in (15 mm)
0.6 in (15 mm)
2
5
T1081
T1082
T1083
T1084
2-31