Mercruiser Sterndrive 4.3L MPI 180 HP – MERCRUISER MULTIPORT INJECTED (MPI) STERNDRIVE ENGINES

The MPI system fine-tunes the fuel-to-air mixture in the combustion chamber, delivering ultra-smooth operation from idle to wide-open throttle. Mercury’s engineers achieved outstanding Noise / Vibration / Harshness (NVH) levels in the 4.3L. Power steering is standard, providing you complete and effortless control.

HP / kW
  • 180 / 234
Maximum RPM (WOT)
  • 4400-4800
Engine type
  • V-6
Displacement (L)
  • 4.3
Bore and stroke
  • 4.00 x 3.48 / 101 x 88 mm
Compression ratio
  • 9.4:1
Fuel requirement
  • Unleaded 91 RON Minimum
Fuel delivery system
  • Multi-point Electronic Fuel Injection (MPI)
Air induction
  • Two-piece long runner intake with 75 mm throttle body
Ignition
  • Crank fired high voltage switch with knock control
Alternator amp / Watt
  • 65 amp / 917 watt
Water drain system
  • Single point manual drain
Exhaust system
  • Iron manifolds with electro-deposition paint coated dry joint exhaust elbow
Cooling system
  • Raw water
Accessory drive system
  • Serpentine belt
Recommended oil
  • NMMA Certified FCW 25W-40 Synthetic Blend
Engine guardian system
  • High coolant temperature
  • Knock control
  • Low drive lubricant
  • Low oil pressure
  • Low voltage
  • Over-rev
Dimensions (L x W x H)
  • 28 x 30 x 22″ / 696 x 740 x 559 mm
Weight (engine only)
  • 775 lbs / 352 kg
Compatible drives
  • Alpha