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2008 Mercury 50 HP EFI


In Stock
J & J Marine, Inc.
Stock #



Mercury Four-Strokes have long led the pack with clean, quiet, fuel-efficient outboard power, and now the gap has grown even wider. Mercury engineers implemented a new shift design which provides easier shifting. We refined the throttle resolution setting for smoother low speed operation. Plus, all the 40-60hp Four-Strokes feature new styling, graphics, a cowl latching system and much more! The 40-60hp are available in both Standard and BigFoot gearcase models. BigFoot models are perfect for pontoons and large boats, while the Standard models are ideal for aluminum fishing boats, bay boats and inflatables. The Mercury 40-60hp Four-Strokes models distinguish themselves with many features you just won't find on other engines. Features that make your boating experience a pure pleasure. Everything from reliable, instant starts and clean, quiet operation to flawless performance under almost any condition makes Mercury mid-range engines a perfect fit for your boat. No stone was left unturned in our search for excellence, and the resulting engines deliver the reliable, responsive power you need, along with the fuel-efficient performance that has made Mercury FourStrokes the world's best-selling mid-range four-strokes. Delivering peace of mind is a leading priority with Mercury FourStrokes. From the first time you turn the key to your hundredth fishing trip and beyond, you can count on them to perform. The advanced technology, durable components, smart features and unmatched warranty combine to provide the engine security you need today and in the years to come.

  • CONSISTENT STARTING: Mercury FourStroke EFI outboards deliver consistent, easy starts, smooth operation and reliability. The 25 and 30 hp models are the industry's first batteryless EFI outboards.
  • BORN TO BE SMOOTH: All portable and mid-range Mercury FourStrokes feature INLINE DESIGNS for inherently smooth operation.
  • EASY SHIFTING: PRECISION ENGINEERED SHIFT system delivers smooth shifting for an improved driving experience.
  • CLEAN POWER: All Mercury FourStrokes are designed to run clean, helping to protect the environment for generations to come. Every Mercury mid-range FourStroke engine carries a CARB THREE-STAR ULTRA-LOW EMISSIONS RATING.Electronics Leadership: Every Mercury 75 – 115 horsepower FourStroke outboard features a 50-AMP, 630-WATT ALTERNATOR, the most powerful in its class. This impressive alternator can power all your accessories – electronics, lights, livewells and audio equipment – throughout your trip.
  • TAKE IT SLOW: Every 40 – 115 horsepower SmartCraft equipped FourStroke features TROLL CONTROL, which allows you to set your rpm as low as 550 for trolling or running through extended no-wake zones.
  • INDUSTRY-LEADING WARRANTY: Every Mercury outboard comes with a three-year limited factory-backed, nondeclining warranty (except Mercury Racing models).
  • SMART ENGINES MEAN MORE FUN: The ECM (Electronic Control Module), with its advanced microprocessor, is the brain of the Mercury FourStroke engine. It controls engine functions such as idle speed, starting and smooth performance and alerts you to potential problems.
  • SUPERIOR CORROSION PROTECTION:Mercury FourStrokes deliver powerful saltwater protection by using more stainless steel components, hard anodizing, engineered polymers and exclusive multistep painting and coating processes. Saltwater maintenance is made easy in the 40 – 115 hp models with the innovative freshwater flushing water. And… only Mercury offers a three-year limited corrosion failure warranty.
  • TOTAL INTEGRATION FOR CAREFREE BOATING: All 40 – 115 hp Mercury FourStrokes are designed to be SmartCraft Compatible for the ultimate in easy boating. SmartCraft Integrated Marine Technology brings together all boat and engine functions to provide the information you need, such as current fuel usage or warnings of a potential problem.
  • PEACE OF MIND: Engine Guardian uses more than 40 sensors to monitor functions of your engine. If the proactive operator-warning system detects a potential problem – such as overreving, overheating or low oil pressure – Engine Guardian sends out an alert and automatically reduces engine power to prevent damage.
  • EASY STARTS. SMOOTH RUNNING: The 40 - 60 hp Mercury engines are Electronically Fuel-Injected, which provides turn-key starting, increased power, improved fuel economy and spectacular reliability.
  • LESS FUEL, MEANS MORE FUN: The 40-60hp models deliver up to 40% better fuel economy than carbureted 2- stroke models and up to 20% better than directed injected 2-strokes.
  • HP @ Prop: 50
  • kW @ Prop: 37
  • Max RPM (WOT): 5500-6000
  • Cylinder/Configuration: 4 (in-line)
  • Displacement (CID/cc): 60.8/995
  • Bore & Stroke (mm): 65 x 75
  • Bore & Stroke (in): 2.56 x 2.95
  • Ignition System: ECM 555 Digital Inductive
  • Starting: Electric (Turn key)
  • Cooling System: Water-cooled w/thermostat
  • Gear Ratio: 1.83:1
  • Gear Shift: F-N-R
  • Steering: Remote or tiller
  • Alternator Amp: 18
  • Alternator Watt: 223
  • Trim System: Power trim
  • Exhaust System: Through prop
  • Lubrication System: Integrated Dry Sump
  • Fuel/ Ethanol Tolerance: 87 Octane / Up to 10%
  • Recommended Oil: Mercury Synthetic Blend 25W-40
  • Fuel Induction System: 2-Valve per Cylinder, Single Overhead Cam (SOHC)
  • Shaft Length (inches): 20
  • Shaft Length (mm): 508
  • Dry Weight (lbs.): 247
  • Dry Weight (kg.): 112
  • Operator Warning System: SmartCraft Engine Guardian
  • Available Propellers: Consult current dealer propeller guide
  • SmartCraft: Yes
  • CARB Star Rating: 3
  • Limited Warranty: 3-Year Non-Declining and 3-Year Corrosion Failure



Engine Type
4 Cylinder (in-line)
Bore x Stroke
65" x 75" (2.56 x 2.95 mm)
60.8 cu. in. (995 cc)
ECM 555 Digital Inductive, Electric (Turn key)


Shaft Length
20 in. (508 mm)
247 lbs. (112 kg)


Trim Method
Power trim
Propshaft Horsepower
50 hp (37 kw)
Full Throttle Operating Range
5500 - 6000 RPM
Gear Ratio / Shift
1.83:1, F-N-R
Fuel Induction
2-Valve per Cylinder, Single Overhead Cam (SOHC)
18 Amps (223 watt)
Water-cooled w/thermostat
Remote or tiller
3 Year