Section 4 - Specifications
Page 66
90-899883154 JANUARY 2008
Models
Axius SeaCore 496 MAG and Axius 496 MAG
Axius SeaCore 496 MAG
H.O. and Axius 496 MAG
H.O.
Power
280 kW (375 hp)
317 kW (425 hp)
Number of cylinders
8
Displacement
8.1L (496 cid)
Bore and stroke
108 × 111 mm (4.25 × 4.38 in.)
Compression ratio
9.1:1
Idle RPM in neutral
650
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
1‑8‑7‑2‑6‑5‑4‑3
Electrical system
12 V negative (–) ground
Alternator rating
65 A
Recommended minimum
battery rating (Non‑DTS
models)
750 CCA, 950 MCA, or 180 Ah
Recommended minimum
battery rating (DTS models)
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: It may be necessary to adjust oil levels depending on installation angle and
cooling systems (heat exchanger and fluid lines).
Always use the dipstick to determine the exact quantity of oil or fluid required.
All Models
Capacity
Fluid Type
Engine oil (with filter)
8.5 liters (9 U.S. qt.) Mercury/Quicksilver Synthetic Blend
MerCruiser Engine Oil 25W‑40
Seawater cooling system (winterization use
only)
20 liters (21 U.S. qt.) Propylene Glycol and Purified Water
Closed cooling system
18 liters (19 U.S. qt.)
Mercury Extended Life Coolant/
Antifreeze or Extended Life Ethylene
Glycol 5/100 Coolant/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)