496 MAG H.O. - 425 hp

The 425 hp 496 MAG H.O. is the most powerful MerCruiser engine available in our standard lineup. A special camshaft profile and unique fuel and spark calibration combine to provide an additional 50 hp and a 200 RPM higher operating range compared to the 496 MAG. Its massive power is coupled to a beefy Bravo X series drive with a number of performance drive options available for faster boats. Even with the additional horsepower, the 496 MAG H.O. is amazingly well-mannered and reliable. Standard low-restriction exhaust with stainless steel elbows, along with our most sophisticated spark and fuel injection systems, deliver outstanding acceleration and top speed

Power	425HP (312 kW)
Full Throttle Range	4600-5000 RPM
Displacement	496 CID (8.1L)
Engine Type	V8
Bore & Stroke	4.25" X 4.38" (108mm X 111mm)
Compression Ratio	9.1:1
Fuel Requirement	87 Octane (R+M)/2
Engine Control System	PCM 555 with SmartCraft CAN Capability
Fuel Delivery System	Gen III Cool Fuel
Fuel Injection System	Sequential Multi-Point Electronic Fuel Injection
Induction System	2-pieceLong Runner intake with 75mm Throttle Body (80mm w/DTS)
Ignition System	Distributorless Ignition w/Knock Control and Platinum Spark Plugs
Charging System	65 Amp/917 Watt Alternator
Water Drain System	Single Point Air-Actuated
Exhaust System	Tuned Runner Exhaust Manifolds with 316 Stainless Steel Tubular Dry Joint Elbows
Cooling System	Closed Cooling, Long Life 5-Year Anti-Freeze, Brass Sea Water Pump
Accessory Drive System	Serpentine Belt, Stainless Steel Spring Automatic Tensioner
Recommended Engine Oil	MerCruiser Full Synthetic Engine Oil - SAE 20W-40
Engine Guardian System	Low Oil Pressure, High Coolant Temperature, High Exhaust Manifold Temperature, Low Drive Lube, Low Sea Water Pressure, Low Voltage, Over-rev control, Knock Control
Bravo One, Bravo One X Ratios	1.36, 1.50, 1.65(H)
Bravo Two, Bravo Two X Ratios	1.81, 2.00, 2.20(H)
Bravo Three, Bravo Three X Ratios	1.81, 2.00, 2.20,(H)
Bravo One XR Ratios	1.26, 1.35, 1.50
Bravo Three XR Ratios	2.0
Dimensions (LxWxH) in	35x 33 x 24
Dimensions (LxWxH) mm	878 x 838 x 610
Weight w/ Bravo One, X, XR (lbs./kg)	1199/544
Weight w/ Bravo Two, X (lbs./kg)	1214/551
Weight w/ Bravo Three, X (lbs./kg)	1224/556
Digital Throttle and Shift	Optional