PERIODIC MAINTENANCE 2-11
Tachometer
12V
Battery
Yellow
Black
Gray
IDLE SPEED
Inspect initially after 20 hours ( 1 month ) and every
200 hours (12 months ) thereafter.
Checking
NOTE :
• Before checking the idle speed, the engine should be al-
lowed to warm up.
• Check and / or adjust the idle speed after the engine speed
has stabilized.
1. Check link mechanism and carburetor throttle valves for
smooth operation.
2. Connect the tachometer lead wires as follows:
[[
[[
[ 34200-92E02 : Engine tachometer
• Yellow lead wire to the Yellow/Black lead wire of CDI unit.
• Gray lead wire to DC 12V power source positive terminal.
• Black lead wire to DC 12V power source negative terminal.
• Set the pole selection switch in the tachometer to “12”.
3. Start the outboard motor.
4. Check the idle speed.
Idle speed (in neutral gear) : 850 – 950 r/min
Adjustment
If the idle speed is out of specification, adjust it as follows:
NOTE :
• Before adjusting idle speed, make sure carburetor throttle
valves are properly synchronized.
(See the “SYNCHRONIZING THROTTLE VALVES” section
on page 2-13.)
• Adjust the idle speed by rotating the idle adjusting screw
only.
• Do not rotate the throttle valve screws in Top & 2nd carbure-
tor to adjust idle speed.
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