Mercury 40 Service Manual page 123

Section 2C - Timing, Synchronizing, & Adjusting
Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carburetor Adjustments . . . . . . . . . . . . . . . . . . . .
Idle Speed Adjustment
Specifications
IGNITION SYSTEM*
*Readings taken @ 68 F
(20 C).
CARBURETOR
90-828631R3 MARCH 1999
ELECTRICAL
2C-1
2C-2
2C-3
. . . . . . . . . . . . . . . . . . 2C-3
Type
Spark Plug Type (NGK)
Spark Plug Gap
Firing Order
Ignition Timing:
40/45 HP
Fully Retarded
Fully Advanced (2500-3000 rpm)
50 HP
Fully Retarded
Fully Advanced (2500-3000 rpm)
Charge Coil Resistance
Trigger Coil Resistance
Ignition Coil Resistance:
Primary
Secondary
C.D.I. Engine Speed Limiter
C.D.I. Overheat Speed Control
Engine Temperature Switch
Below 131 F (55 C)
Above 104 F (40 C)
Idle rpm (Out Of Gear)
45 hp
40/50 hp
Idle rpm (In Forward Gear)
45 hp
40/50 hp
Wide Open Throttle rpm (WOT)
Range
Main Jet Size
40/45 hp
Carburetors 1 and 2
Carburetors 3 and 4
50 hp
Pilot Jet
Float Height
TIMING, SYNCHRONIZING, & ADJUSTING
Carburetor Sync. – Dynamic Adjustment
Idle Mixture Screw Adjustment
Dash-Pot Adjustment . . . . . . . . . . . . . . . . . . .
Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacitor Discharge Ignition
NGK DPR6EA-9
0.035 in. (1.0 mm)
272 - 408 Ω (BRN-BLU)
396 - 594 Ω (WHT/BLK-WHT/RED)
6120 - 6280 rpm
1600 - 2400 rpm
No Continuity
950
825
850
725
5500–6000 rpm
0.39 0.02 in. (10.0
. . 2C-4
. . . . . . . . . . . 2C-7
2C-9
2C-10
1-3-4-2
5 B.T.D.C
25 B.T.D.C
5 B.T.D.C
35 B.T.D.C
0.1 - 0.7 Ω
3.5 - 4.7 kΩ
Continuity
25 rpm
25 rpm
25 rpm
25 rpm
#104
#103
#112
#42
0.5 mm)
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