Fuel Tank And Fuel Line; Gear Oil; Idle-Speed - Yamaha 20C Service Manual

GEN
SRVC PERIODIC SERVICE
D32600-0

FUEL TANK AND FUEL LINE

1) Check the fuel tank and fuel line for leaks.
2) Clean the fuel tank thoroughly.
D32900-0

GEAR OIL

1) Drain the gear oil thoroughly, and pour in new
oil.
2) Check for water or metallic sediment in the
drained oil.
NOTE:
If the gear oil becomes "milky" check the gear case
oil seals and shift boot for water entry.
D33000-0

IDLE-SPEED

1) Turn the pilot screw until it is lightly seated.
2) Turn the pilot screw outward to specification.
Pilot screw (turns out):
1 1/8 – 1 5/8
3) Start the motor, and allow it to warm up for a
few minutes.
4) Set the idle-speed to the specified level by set-
ting the throttle stop-screw. Use a tachometer
for checking the speed when adjusting the
motor speed.
NOTE:
Turning the throttle stop-screw clockwise increases
the motor speed; turning it counterclockwise
decreases the motor speed.
Idle speed:
950 – 1,050 r/min
3-8
E