Maritime Propulsion Marine engines, propulsors, electrification and drivetrain news

MERCRUISER 8.1 H.O. - 420 HP

Model
420 HP
Type
Engine
Application
Commercial, Recreational

Description

Product Description:

The Mercruiser 8.1 H.O. (High Output) - 420 HP is a powerhouse marine engine designed to elevate your boating experience. Renowned for its high performance and durability, this engine provides the perfect blend of power and efficiency for thrilling water adventures. Whether you're cruising, towing skiers, or racing across the open water, the Mercruiser 8.1 H.O. delivers seamless performance and reliable power.


Price: Starting at $18,995 USD

(Note: Prices may vary depending on the dealer and any optional features.)


Key Features:

  1. High Output Power: With a robust 420 HP, this engine ensures rapid acceleration and top-speed performance.
  2. Smooth and Efficient Operation: Equipped with advanced fuel injection technology for consistent power delivery and optimal fuel efficiency.
  3. Durability: Built with corrosion-resistant materials and a heavy-duty cooling system to ensure longevity in marine environments.
  4. Versatile Compatibility: Engineered to fit a wide range of boats, making it a versatile option for various marine applications.
  5. Eco-Friendly: Designed to meet stringent emission standards, providing an environmentally responsible power solution.

Technical Specifications:

  • Engine Type: V8
  • Displacement: 8.1 L (496 CID)
  • Horsepower: 420 HP
  • Max RPM: 4600 - 5000
  • Fuel System: Multi-port Fuel Injection (MPI)
  • Bore & Stroke: 4.25 in. x 4.37 in. (107.95 mm x 111.1 mm)
  • Compression Ratio: 8.75:1
  • Cooling System: Freshwater Cooling (Closed Cooling System)
  • Fuel Type: Unleaded Gasoline
  • Ignition System: Digital Electronic Ignition
  • Alternator Output: 65 Amps
  • Weight: Approx. 1198 lbs (543 kg)
  • Dimensions (L x W x H): 32 x 34 x 22 in. (813 x 864 x 559 mm)

The Mercruiser 8.1 H.O. - 420 HP is engineered to provide superior performance, reliability, and efficiency. Perfect for boating enthusiasts who demand the best, this engine ensures you can tackle the water with confidence and style.

Specifications

Power 420 HP (313.19 kW)
Cylinders Arrangement/Number V8
Bore 108 mm (4.25 in)
Stroke 111 mm (4.37 in)
Weight 513 kg (1,130.97 lb)
Length 1,194 mm (47.01 in)
Rated Speed 4,400 r/min
Width 838 mm (32.99 in)
Height 610 mm (24.02 in)
Powerkw 309 kW (414.38 HP)
Displacementin3 496 in3 (8,127.98 cm3)
Lengthin 47 in (1,193.8 mm)
Widthin 33 in (838.2 mm)
Heightin 24 in (609.6 mm)
Weightlb 1,130 lb (512.56 kg)
Compression Rate 9.1:1
Borein 4.25 in (107.95 mm)
Strokein 4.38 in (111.25 mm)