Mercury 50 Service Manual

CARBURETOR
90-828631R3 MARCH 1999 Page 3B-15
Fast Idle Adjustment
NOTE: Fast idle adjustment is required when fast idle exceeds 1500 rpm or engine stalls
during a cold start.
1. Remove the link rods (a & b) and loosen fast idle screw (c).
2. Loosen idle stop screw (d) until the screw is free from the lever.
3. Tighten the idle stop screw (d) until the bypass hole is half visible.
4. Tighten the idle stop screw (d) to the specified number of turns from the graph.
5. Connect the link rods (a &b).
6. Hold the fast idle lever (f) to the roller (g) and secure the fast idle screw (c).
e
a
d
c
f
g
b
a-Link Rod
b-Link Rod
c-Fast Idle Screw
d-Idle Stop Screw
e-Bypass Hole (Reference View Only)
f-Fast Idle Lever
g-Roller
Turns
Temp. (°C)

Mercury 50 Specifications

General

Horsepower	50 hp
Cylinders	3
Steering	Remote
Starting	Electric
Displacement	995 cc
Fuel Induction System	EFI (Electronic Fuel Injection)
Alternator Output	18 amp
Shaft Length	20" / 508 mm
Dry Weight	112 kg
Engine Type	4-Stroke