496 MAG H.O. - 425 hp
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
Details
| 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 |
