Mercury Alpha

78
CA954
Engine Specifications
(V-6 Models)
Models 4.3L 4.3LH 4.3L EFI
Propshaft Horsepower
(SAV1 Rating)
190
1
205
1
(190
2
)
210
1
(188
2
)
Propshaft Kilowatts
(SAV1 Rating)
142
1
153
1
(142
2
)
157
1
(140
2
)
Displacement 262 cid (4.3 l)
Maximum rpm @ WOT
3
4400-4800 rpm
Idle rpm in NEUTRAL 650 rpm
5
600 rpm
6
Oil Pressure @ 2000 rpm 30-70 psi (207-483 kPa)
Min. Oil Pressure @ Idle 4 psi (28 kPa)
Thermostat 160° F (71° C)
Timing @ Idle rpm
4
10 ° BTDC 8° BTDC
Firing Order 1-6-5-4-3-2
Electrical System 12-Volt Negative (–) Ground
Alternator Rating - Hot
Operating Amps
65 Amps
Alternator Rating - Cold
Operating Amps
72 Amps
Recommended Battery
Rating (Minimum)
375 cca /
475 mca/ 90 Ah
550 cca/
700 mca/120 Ah
1
Power Rated in Accordance with NMMA (National Marine Manufacturers’ Associa-
tion) rating procedures.
2
Power Rated in Accordance with SAV 1 rating procedures. Horsepower differ-
ences shown result from differences in test rpm, allowable test tolerances, and/or
installation of special kit components.
3
Measured using an accurate service tachometer with engine at normal operating
temperature.
4
A special procedure must be followed to check or adjust timing. Consult your
Authorized Mercury MerCruiser Dealer before attempting this procedure.
5
A special procedure must be followed to adjust idle rpm. Consult your Authorized
Mercury MerCruiser Dealer before attempting this procedure.
6
Idle speed on EFI models is not adjustable.