New 2019 Mercury 383 MAG Bravo 4V Plus-Series Engine – $9,659.00*

383 MAG Bravo 4V

383 MAG Bravo 4V Plus-Series Engine by Mercury Remanufacturing. Mercury PT# 865108R90 (NEW) with 1-Year Mercury Factory Warranty. 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 (optional) Stainless Steel 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 Stainless Steel exhaust headers sold separately.


  • Part Number: 865108R90
  • Horsepower @ flywheel: 350
  • 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
  • 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 w/Teflon Coated Skirt
  • 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


Condition New
Manufacturer Mercury
Model Year 2019
Model 383 MAG Bravo 4V Plus-Series Engine
Retail Price $11,325.00
SALE PRICE $9,659.00*
Color Black
Stock Number 865108R90
Additional Pricing Information Can be Shipped in CONTINENTAL UNITED STATES




*Price, if shown, does not include government fees, taxes, additional equipment, installation or any finance charges (if applicable). Final actual sales price will vary depending on options or accessories selected.
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