Mercruiser 4.3L Marine Engines & Specifications
Mercruiser Engine Specifications
(4.3L/V-6 Models)
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Marine Engines Models |
4.3L |
4.3LH |
4.3L EFI |
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Propshaft Horsepower (SAV1 Rating) |
1901 |
2051 (1902) |
2101 (1882) |
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Propshaft Kilowatts (SAV1 Rating) |
1421 |
1531 (1422) |
1571 (1402) |
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Marine Engine Displacement |
262 cid (4.3 l) |
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Maximum rpm @ WOT3 |
4400-4800 rpm |
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Idle rpm in NEUTRAL |
650 rpm5 |
600 rpm6 |
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Oil Pressure @ 2000 rpm |
30-70 psi (207-483 kPa) |
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Min. Oil Pressure @ Idle |
4 psi (28 kPa) |
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Thermostat |
160o F (71o C) |
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Timing @ Idle rpm4 |
10o BTDC |
8o BTDC |
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Firing Order |
1-6-5-4-3-2 |
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Electrical System |
12-Volt Negative (-) Ground |
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Alternator Rating – Hot Operating Amps |
65 Amps |
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Alternator Rating – Cold Operating Amps |
72 Amps |
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Recommended Battery Rating (Minimum) |
375 cca/ 475 mca/ 90 Ah |
550 cca/ 700 mca/120 Ah |
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1 Power Rated in Accordance with NMMA (National Marine Manufacturers’ Association) rating procedures.
2 Power Rated in Accordance with SAV 1 rating procedures. Horsepower differences 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.