Tune-Up Specifications; Mcm (Stern Drive) - Mercury MCM Series Important Information Manual

Tune-Up Specifications

MCM (Stern Drive)

Model
Propshaft Ratings
HP (KW
)
Number of Cylinders
Displacement
Bore/Stroke In. (mm)
Compression Ratio
Compression Pressure
Idle RPM
(in Forward Gear)
Max. RPM (at W.O.T.)
Oil Pressure
(at 2000 RPM)
Min. Oil Pressure
(at Idle)
Fuel Pump Pressure
(at 1800 RPM)
Fuel Rail Pressure
(Running) (E.F.I. Only)
Electrical System
Min. Battery
Requirements
Firing Order
Spark Plug Type
Spark Plug Gap
Timing (at Idle RPM)
Preliminary Idle Mixture
Thermostat
Index
1B-4 - MAINTENANCE
MCM 7.4L
MCM 7.4L
PT Bravo
Three
300 (224) 300 (224)
454 C.I.D (7.4L)
4.25x4.00 (108x101.6)
8.0:1
650
4200-4600
450 cca
575 mca
90A/h
AC MR43T/Champion RV15YC4/NGK BR6FS
1 1/4 Turns
143 F
(62 C)
MCM 454 MCM 454
Magnum EFI
350 (261) 385 (287)
V-8
150 PSI (1034 kPa)
600
4600-5000
30-70 PSI (207-483 kPa)
4 PSI (28 kPa)
3-7 PSI (21-48 kPa)
37 PSI
(255 kPa)
12 V Negative (–) Ground
650 cca,
825 mca,
or 150A/h
1-8-4-3-6-5-7-2
.035 in (0.9 mm)
8 Degrees BTDC
160 F
(71 C)
MCM 502
MCM 502
EFI
Magnum
Magnum
390 (291) 415 (309)
502 C.I.D. (8.2L)
4.47 x 4.00
(113.5 x 101.6)
8.6:1
650 600
37 PSI
(255 kPa)
550 cca, 650 cca,
700 mca or 825 mca,
120A/h or 150A/h
1 1/4 Turns
143 F 160 F
(62 C) (71 C)
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