2026 Mercury Marine® 4.3L Alpha® 4V Base

Information

2026 Mercury Marine® 4.3L Alpha® 4V

Best Value on the Water

Mercury remanufactured engines are factory refurbished with new components featuring the latest specifications and the newest technology, allowing you and your boat to benefit from improved power and reliability for less than the cost of a new engine.

Backed with Confidence

All Mercury remanufactured engines are backed by a one-year limited factory warranty. Mercury Product Protection is also available to provide up to an additional two years of coverage.

A Greener Solution

Engines from Mercury Remanufacturing reduce environmental impact by recycling and reusing major components brought back to OEM specifications. This reduces wasteful scrapping and lowers the energy and resources required to manufacture new parts.

Features may include:

Plus-Series Alpha
  • With more power and better fuel economy than a 5.0L V8, the 4.3L Alpha® 4V 225hp engine is an ideal choice to repower an 18-to 20-foot runabout.

Photos

Highlights

  • Port Clinton, Ohio
  • 2026
  • Mercury Marine®
  • 4.3L Alpha® 4V Base
  • Available

Specifications

  • 2026
  • Mercury Marine®
  • 4.3L Alpha® 4V
  • Base
  • General
  • LxWxH: 28" x 30" x 22" (696mm x 740mm x 559mm)
  • Thermostatically Controlled Raw Water - 160 degrees F
  • Engine: 782 pounds (355kg)
  • Remanufactured V6 Iron Block
  • 225HP (168kW)
  • System: EST
  • System: High-Flow Oil Pump
  • 4.030" (102mm)
  • 3.480" (88mm)
  • System: Dual-Plane Aluminum Intake with Bronze Crossover and Pads
  • 9.4:1 | Rocker Arm: 1.5:1
  • 4200-4600 RPM
  • System: Iron Manifold with Wet-Joint Exhaust Elbow
  • Accessory: Serpentine Belt
  • 65 Amp/917 Watt Alternator
  • Warning: Oil Pressure, Coolant Temperature, Drive Lube
  • 600 CFM Weber Carburetor with Electric Fuel Pump and Choke | Requirement: 87 OCTANE (R+M)/2
  • Water Drain: System Multi-Point Drain - Hand-Removable Blue Drain Plugs | Alpha Ratios: 1.62:1, 1.81:1 High Altitude
  • Recommended Engine: SAE 25-40 NMMA Certified FC-W Synthetic Blend