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