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Tech Articles > Mercruiser Product Specifications > Mercruiser 7.4L Performance Spec's
Engine Specifications
(7.4L V-8 Models)
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Models
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7.4L MPI
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454 Mag MPI
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Propshaft Horsepower
(SAV1 Rating)
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3101
(2752)
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3851
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Propshaft Kilowatts
(SAV1 Rating)
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2311
(2052)
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2871
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Displacement
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454 cid (7.4 l)
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Maximum rpm @ WOT3
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4200-4600 rpm
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4600-5000 rpm
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Idle rpm in NEUTRAL3
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600 rpm6
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Oil Pressure @ 2000 rpm
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30-70 psi (207-483 kPa)
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Min. Oil Pressure @ Idle
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4 psi (28 kPa)
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Thermostat
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160° F (71° C)
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Timing @ Idle rpm4
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8° BTDC
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Firing Order
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1-8-4-3-6-5-7-2
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Electrical System
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12-Volt Negative (-) Ground
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Alternator Rating – Cold
Operating Amps
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65 Amps
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Alternator Rating – Hot
Operating Amps
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72 Amps
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Recommended
Battery
Rating
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Minimum 650 cca/825mca/150 Ah
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1 Power Rated in Accordance with NMMA (National Marine Manufacturers’ Association) rating procedures.
2 Power Rated in Accordance with SAV1 rating procedures. Horsepower differences shown result from differences in test rpm, allowable test tolerances, and/or installation of special kit components.
3 Measure 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.
6 Idle speed on EFI models is not adjustable.
