Friday, July 19, 2024


Model: 250 HP


Product Specification Listing: Marine Engine MERCRUISER 4.2 EI 250

Overview: The MERCRUISER 4.2 EI 250 is a reliable and powerful marine engine designed for exceptional performance and durability in a variety of marine applications. Ideal for recreational boating, cruising, and watersports, this engine delivers impressive power and efficiency.

Technical Specifications:

  • Engine Type: 4.2L V6 MPI (multi-port fuel injected) marine engine
  • Engine Displacement: 4.2 liters
  • Bore & Stroke: 96mm x 84mm (3.78 in x 3.31 in)
  • Compression Ratio: 9.4:1
  • Horsepower: 250 HP at 5,000 RPM
  • Torque: 300 lb-ft (407 Nm) at 2,500 RPM
  • Aspiration: Natural aspiration
  • Fuel System: Multi-port electronic fuel injection


  • Maximum RPM: 5,000 RPM
  • Fuel Type: Regular unleaded gasoline (minimum 87 octane)
  • Fuel Consumption: Approximately 16-18 gallons per hour at wide-open throttle
  • Throttle Control: Digital throttle and shift (DTS)

Dimensions & Weight:

  • Overall Length: 32.6 inches (830 mm)
  • Overall Width: 29.9 inches (760 mm)
  • Overall Height: 21.2 inches (540 mm)
  • Dry Weight: Approximately 952 lbs (432 kg)

Cooling System:

  • Type: Closed cooling system with heat exchanger for enhanced corrosion resistance
  • Coolant Type: Ethylene glycol-based antifreeze


  • Alternator Output: 65 amp
  • Ignition System: Distributorless ignition system (DIS) with knock control
  • Battery Voltage: 12V DC
  • Battery Recommendations: Minimum MCA 675, CCA 550

Exhaust System:

  • Type: Water-cooled exhaust manifold and riser
  • Exhaust Outlet: Through transom or through prop

Lubrication System:

  • Type: Pressure lubricated with spin-on oil filter
  • Oil Capacity: 7 quarts (6.6 liters)

Transmission Options:

  • MerCruiser Alpha One: Single propeller sterndrive
  • MerCruiser Bravo Two: Twin propeller sterndrive for higher torque applications

Additional Features:

  • Corrosion Protection: MerCruiser exclusive low-copper content block casting and special coatings for saltwater protection
  • Diagnostic Capabilities: Engine Guardian System monitors vital engine functions and sends alerts to help prevent damage due to low oil pressure, high coolant temperature, etc.
  • Emission Compliance: Meets U.S. EPA and California Air Resources Board (CARB) regulations for marine engines


  • Standard Warranty: Limited 3-year factory warranty
  • Extended Protection: Optional extended service plans available


  • Suitable for a variety of boats, including bowriders, deck boats, cruisers, and sport boats up to 30 feet

The MerCruiser 4.2 EI 250 engine combines advanced engineering with robust construction to offer marine enthusiasts a powerful yet efficient choice for their boating needs. For more information, installation requirements, and dealer locations, visit the official MerCruiser website or contact an authorized dealer.

[Product Type: Engine]

Product Specifications

Strokein 3.94 in
Stroke 100 mm (3.94in)
Rated Speed 3800 r/min
Powerkw 184 kW
Power 250 HP (186.40kw)
Displacementin3 254 in3
Displacement 4.2 cm3 (0.00L, 0.26in3)
Cylinders Arrangement/Number 6
Borein 3.7 in
Bore 94 mm (3.70in)