Adjustments; Idle - Mercury 40 Service Manual

9. Hold throttle arm against full throttle stop screw.
Adjust full throttle stop screw to allow throttle
shutters to open fully while providing approxi-
mately .015 in. (.38 mm) free-play in throttle link-
age to prevent carburetor throttle shutters from
acting as throttle stops at wide open throttle.
Tighten locknut on stop screw.
b
c
a - Throttle Arm
b - Stop Screw
c - Locknut (Hidden)
10. Reinstall attenuator cover.
2C-4 - ELECTRICAL

Adjustments

Idle

1. With engine in water, connect electrical harness
2. Properly adjust carburetor low speed mixture
3. Hold throttle arm at idle position (throttle cable
a
55039
51045
a - Idle Timing Screw
b - Locknut
(if equipped) and fuel line to engine. Start engine
and allow to warm up.
screws. Initial setting is 1-1/4 turns off seat.
barrel removed from barrel retainer). Adjust idle
timing screw to attain an engine idle RPM of
650-700 RPM in "FORWARD" gear. Tighten lock-
nut and turn off engine.
90-852572R1 JANUARY 1998
a
b