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Mercruiser 8.2L Marine Engine Specifications
(V-8 Models)
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Models
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502 Mag MPI
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Propshaft Horsepower
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4151
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Propshaft Kilowatts
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3091
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Displacement
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502 cid (8.2 l)
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Maximum rpm @ WOT3
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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 – Hot
Operating Amps
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65 Amps
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Alternator Rating – Cole
Operating Amps
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72 Amps
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Recommended
Battery
Rating
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Minimum 650 cca/825 mca/150 Ah
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1 Power Rated in Accordance with NMMA (National Marine Manufacturers’ Association)
rating procedures.
3 Measured using an accurate service tachometer with engine at normal operating temperatures.
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.
