Mercruiser Sterndrive 377 MAG – MERCRUISER MULTIPORT INJECTED (MPI) STERNDRIVE ENGINES are built to exceed your expectations with impressive technologies that give you instant peace of mind. The computer controlled fuel and ignition system and platinum-tipped spark plugs ensure reliable starts and outstanding performance.
| Power | 320HP (239 kW) |
| Full Throttle Range | 4800-5200 RPM |
| Displacement | 377 CID (6.2L) |
| Engine Type | V8 |
| Bore & Stroke | 4.00″ X 3.75″ (101mm X 95mm) |
| Compression Ratio | 9.0:1 |
| Fuel Requirement | 87 Octane (R+M)/2 |
| Engine Control System | ECM 555 with SmartCraft CAN Capability (PCM 555 w/DTS) |
| Fuel Delivery System | Gen III Cool Fuel |
| Fuel Injection System | Multi-Point Electronic Fuel Injection (Sequential Fuel Injection w/DTS) |
| Induction System | 2-pieceLong Runner intake with 75mm Throttle Body (80mm w/DTS) |
| Ignition System | Crank-fired High Voltage Switch w/Knock Control and Platinum Plugs |
| Charging System | 65 Amp/917 Watt Alternator |
| Water Drain System | 3-Point Manual |
| Exhaust System | Iron Manifold with Ceramic Coated Dry-joint Exhaust Elbow |
| Cooling System | Thermostatically Controlled, Raw Water, Brass Sea Water Pump |
| Accessory Drive System | Serpentine Belt |
| Recommended Engine Oil | MerCruiser Full Synthetic Engine Oil – SAE 20W-40 |
| Engine Guardian System | Low Oil Pressure, High Coolant Temperature, Transmission Temperature, Low Sea Water Pressure, Low Voltage, Over-rev control, Knock Control |
| Bravo One Ratios | 1.36, 1.50, 1.65 (P) |
| Bravo Two Ratios | 2.00, 2.20 (P) |
| Bravo Three Ratios | 2.00, 2.20 (P), 2.43 |
| Dimensions (LxWxH) in | 32 x 30 x 22 |
| Dimensions (LxWxH) mm | 814 x 740 x 559 |
| Wt w/ Bravo One (lbs./kg) | 993/451 |
| Wt w/ Bravo Two (lbs./kg) | 1010/459 |
| Wt w/ Bravo Three (lbs./kg) | 1019/463 |
| Digital Throttle and Shift | Optional |
| Optional Freshwater Cooling | SeaCore Optional |
