2008 Mercury 25 HP 4-Stroke


In Stock
Riverview Sports & Marine
Stock #
25 HP 4-Stroke


Dealer Insights

2008 Mercury 4-Stroke EFI 25 HP Motor
Remote Model
Long Shaft ( 20")
Electric Start
Power Trim And Tilt
260 Hours


The 25 and 30 horsepower models have an industry-first batteryless EFI system for easier starting, smooth running and improved efficiency. The 25 horsepower jet drive delivers superior acceleration and precise handling at higher speeds, all while letting you navigate shallow water or rocky river bottoms. Mercury FourStrokes have long led the pack in clean, quiet, fuel-efficient outboard power, and now the gap has grown even wider. We combined innovative engineering with advanced reliability features to make our outboards run clean, stay quiet and deliver smooth, responsive performance – all while cutting your fuel and maintenance costs. 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.
  • 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.
  • 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.
  • 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.
  • HP @ Prop: 25
  • kW @ Prop: 18.6
  • Max RPM (WOT): 5000-6000
  • Cylinder/Configuration: 3 (in-line)
  • Displacement (CID/cc): 32.1/526
  • Bore & Stroke (in): 2.40 x 2.36
  • Bore & Stroke (mm): 61 x 60
  • Cooling System: Water-cooled w/thermostat
  • Ignition System: CDI w/electric spark advance
  • Starting: Manual or Electric
  • Gear Ratio: 1.92:1
  • Gear Shift: F-N-R
  • Steering: Tiller or remote
  • Alternator Amp: 15
  • Alternator Watt: 186
  • Trim System: Manual or power trim
  • Shallow Water Drive: Available
  • Exhaust System: Through prop
  • Lubrication System: Wet sump
  • Recommended Oil: Mercury 4-Stroke Outboard Oil
  • Oil Capacity: 1.8 L / 2 Qt.
  • Fuel Induction System: 2-valve single overhead cam
  • Remote Fuel Tank: Standard
  • Remote Fuel Tank (US Gal): 6.6
  • Remote Fuel Tank (L): 25
  • Shaft Length (inches): 15/20
  • Shaft Length (mm): 381/508
  • Dry Weight (lbs.): 157
  • Dry Weight (kg.): 71
  • Operator Warning System: Low oil pressure, overrev, overheat
  • Available Propellers: Consult current dealer propeller guide
  • CARB Star Rating: 3
  • Warranty: 3 years



Engine Type
3 Cylinder (in-line)
Bore x Stroke
2.40" x 2.36" (61 x 60 mm)
32.1 cu. in. (526 cc)
CDI w/electric spark advance, Manual or Electric


Shaft Length
15/20 in. (381/508 mm)
157 lbs. (71 kg)


Trim Method
Manual or power trim
Propshaft Horsepower
25 hp (18.6 kw)
Full Throttle Operating Range
5000 - 6000 RPM
Gear Ratio / Shift
1.92:1, F-N-R
Fuel Induction
2-valve single overhead cam (SOHC)
15 Amps (186 watt)
Water-cooled w/thermostat
Tiller or remote
3 Year