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Mercury MERCRUISER - Section 4 - Specifications; Fluid Specifications; Engine; Sterndrive-Bravo

Mercury MERCRUISER
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Section 4 - Specifications
Page 74 90-899883295 JUNE 2008
Models
Axius 496 MAG
Axius SeaCore
496 MAG
Axius 496 MAG H.O.
Axius SeaCore 496 MAG H.O.
Power 280 kW (375 hp) 317 kW (425 hp)
Number of cylinders 8
Displacement 8.1 L (496 cid)
Bore and stroke 108 Ɨ 111 mm (4.25 Ɨ 4.38 in.)
Compression ratio 9.1:1
Idle RPM in neutral 625
Specified WOT RPM range 4400–4800 4600–5000
Minimum oil pressure at idle 103 kPa (15 psi)
Thermostat 71° C (160° F)
Timing at idle Not adjustable
Firing order 1–8–7–6–5–4–3
Electrical system 12 V negative (–) ground
Alternator Rating 65 A
Recommended battery rating (Non‑DTS models)
(minimum)
750 CCA, 950 MCA, or 180 Ah
Recommended battery rating (DTS models)
(minimum)
800 CCA, 1000 MCA, or 190 Ah
Spark plug type AC Platinum (AC 41‑983)
Spark plug gap 1.5 mm (0.060 in.)
Fluid Specifications
IMPORTANT: All capacities are approximate fluid measures.
Engine
IMPORTANT: All capacities are approximate fluid measures.
All Models Capacity Fluid Type
Engine oil (with filter) 8.5 L (9 US qt)
Mercury Full‑Synthetic MerCruiser Engine Oil
20W‑40
Seawater cooling system (winterization use
only)
20 L (21 US qt) Propylene glycol and purified water
Closed cooling system 18 L (19 US qt)
Mercury Extended Life Coolant Antifreeze or
extended life ethylene glycol 5/100 antifreeze
mixed 50/50 with purified water
Sterndrive—Bravo
NOTE: Oil capacity includes gear lube monitor.
Model
Capacity Fluid Type
Bravo Three with dual water pickups 2736 mL (92‑1/2 oz)
High Performance Gear Lubricant
Bravo Three with side water pickups only 2972 mL (100‑1/2 oz)
Steering
Axius—All Models
Capacity Fluid Type
Steering system 2914 mL (98‑1/2 oz) Dexron III

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