Specifications

Mercury® Remanufacturing: Plus-Series Inboards

 383 MAG Inboard 4V
Part number
  • 8M0061212 - Standard (LH) Rotation - Transmission not included / 8M0061213 - Opposite (RH) Rotation - Transmission not included
HP / kW @ flywheel
  • 340 / 254
Maximum RPM (WOT)
  • 4600 - 5000
Engine type
  • Remanufactured GM V8 Marine Iron Block & Gen+ Heads - 062 Casting
Displacement (CID/L)
  • 383 / 6.3
Bore and stroke
  • 4.03 x 3.75" / 102 x 95 mm
Compression ratio
  • 9.0:1 with Hypereutectic Pistons
Fuel ethanol tolerance
  • Up to 10%
Fuel requirement
  • 87 octane (R+M)/2
Engine control system
  • Thunderbolt V w/Knock Control - MIE Calibration
Fuel delivery system
  • 4V carburetor and mechanical fuel pump
Fuel injection system / carburetor type
  • 750 cfm Weber 4V with electric choke
Air induction
  • Dual Plane Aluminum Intake Manifold with Bronze Inserts
Alternator amp / Watt
  • 65 amp / 917 watt
Water drain system
  • Multi-point drain - Hand Removable Blue Drain Plugs
Exhaust system
  • Iron manifold with Dry-Joint Exhaust Elbow
Cooling system
  • Thermostatically Controlled Raw Water - 143F
Accessory drive system
  • Serpentine belt
Lubrication system
  • High Flow 100 psi Oil Pump and Copper Oil Cooler
Recommended oil
  • SAE 25W-50 FC-W synthetic blend racing oil
Rocker arms
  • 1.6:1 Full Roller Aluminum
Dimensions (L x W x H)
  • 43 x 29 x 22" / 1092 x 737 x 559 mm
Weight (engine only)
  • 980 lbs / 444 kg - When Installed with 72C Transmission

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http://www.mercurymarine.com/en/us/engines/inboard-and-sterndrive/remanufacturing/plus-series-inboards/383-mag-inboard-4v