383 MAG Bravo 4V

350 Crankshaft Horsepower

Same power and more torque than a 454 HO carbureted engine. This torque monster delivers 429 ft-lbs of raw torque at 3800 RPM to launch even the heaviest boats with authority. When equipped with the same marine exhaust headers as found on the 383 Scorpion, this engine produces 370 HP and 456 ft-lbs of torque—more than a 502 carbureted engine. This is the ideal replacement engine for 454HO and 502 HO carbureted engines that power cruisers, large runabouts, and sport boats. Marine exhaust headers sold separately.

1-Year Factory Warranty

Available when purchased through any Mercury/MerCruiser authorized dealer

2 Additional Years of Coverage

Available from Mercury Product Protection

Resources

Specifications

Part Number 865108R90
Horsepower @ flywheel 350
Kilowatts @ flywheel 261
Maximum RPM (WOT) 4800-5200
Cylinders V-8 Remanufactured Iron Marine Block
Displacement (CID/L) 383 / 5.8
Bore & Stroke (in/mm) 4.03 x 3.75in
102 x 95mm
Compression Ratio 9.5:1
Fuel / Ethanol Tolerance 87 octane / up to 10% ethanol
Engine Control System Thunderbolt V w/Knock Control
Fuel Delivery System 4V carburetor and electric fuel pump
Fuel Injection System / Carburetor Type 750 cfm Weber 4V with electric choke
Induction System Dual plane aluminum intake manifold with brass water crossover
Charging alternator amp 65
Charging alternator watt 917
Water drain system Multi-point drain
Exhaust System Electro-deposition paint coated warm iron manifold with dry joint elbow
Cooling System 143F Raw Water Bravo with Sea Water Pump & Engine Oil Cooler
Accessory Drive System Serpentine belt
Lubrication System High Flow 100 psi Oil Pump
Recommended Oil Mercury MerCruiser Synthetic Blend 25W-40, NMMA FC-W rated
Pistons Forged Aluminum Alloy
Cranktrain Forged Steel Rods and 4340 Steel Crankshaft
Rocker Arms 1.6:1 Full Roller Aluminum
Length (in/mm) 32in / 814mm
Width (in/mm) 30in / 740mm
Height (in/mm) 22in / 559mm
Weight (lbs/kg) 871lbs / 395kg
Features & Related Products Analog Controls
Analog Gauges
Full closed cooling (KIT)
Hydraulic / Power steering
MerCathode
Remote Oil filter
Compatible Drives (Application Dependant - Contact Sales or Service) Bravo One 1.50:1
Bravo One 1.65:1
Bravo Two 1.81:1
Bravo Two 2.00:1
Bravo Two 2.20:1
Bravo Two 2.43:1
Bravo Three 1.81:1
Bravo Three 2.00:1
Bravo Three 2.20:1
Bravo Three 2.43:1

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