Current Mercury Marine® Engines Outboard FourStroke 40 EFI FourStroke 40 EFI

2025 Mercury Marine® FourStroke 40 EFI Base

2025 Mercury Marine® FourStroke 40 EFI Base

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  • Year 2025
  • Make Mercury Marine®
  • Model FourStroke 40 EFI
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Product Details Specifications Photos
2025 Mercury Marine® FourStroke 40 EFI Base

2025 Mercury Marine® FourStroke 40 EFI Base

  • Year 2025
  • Manufacturer Mercury Marine®
  • Model Name FourStroke 40 EFI
  • Trim Name Base
  • Generic Type (Primary) Four Stroke
  • Engine Power 40 HP (30 KW)
  • Engine Type Inline 3
  • Displacement 45.6 CID (747 CC)
  • Throttle Full: 5500-6000 RPM
  • Oil Type Recommended: Mercury FourStroke 25W40 Marine Oil
  • Gear Ratio (Primary) 2.00:1 | Shift: F-N-R
  • Emissions CARB star rating: 3
  • Lubrication System: Wet sump
  • Bore 2.56" (65 mm)
  • Stroke 2.95" (75 mm)
  • Ignition ECM 70
  • Steering Remote | Tiller
  • Cooling Water-cooled with thermostat
  • Exhaust Through prop

2025 Mercury Marine® FourStroke 40 EFI

Held to a Higher Standard.

There are plenty of good reasons these outboards rule the water. Start with no-worry reliability. More low-end torque for excellent acceleration. Increased fuel economy and outstanding overall performance. Enhanced fuel injection (EFI models) for boosted efficiency. A robust electrical system with a high-output alternator to keep batteries charged and fishing electronics humming. They have everything you need, and nothing you don't.

Mercury EFI outboards deliver reliable turnkey starts, improved fuel efficiency, and instant throttle response.

Engine

Engine Power 40 HP (30 KW)
Engine Type Inline 3
Displacement 45.6 CID (747 CC)
Throttle Full: 5500-6000 RPM
Oil Type Recommended: Mercury FourStroke 25W40 Marine Oil
Gear Ratio (Primary) 2.00:1 | Shift: F-N-R
Emissions CARB star rating: 3
Lubrication System: Wet sump
Bore 2.56" (65 mm)
Stroke 2.95" (75 mm)
Ignition ECM 70
Steering Remote | Tiller
Cooling Water-cooled with thermostat
Exhaust Through prop

Operational

Operating Conditions Shallow water trim range (degrees): 20°

Electric

Alternator 18 amp (226 watt)
Starter Electric (turn-key)

Fuel System

Fuel System induction: 2 valves per cylinder, single overhead cam (SOHC) | Electronic Fuel Injection (EFI)
Fuel Type Recommended: 87 octane / up to 10% ethanol

Dimensions

Length Shaft: 15" (381 mm) | 20" (508 mm)

Weights

Dry Weight Lightest model available: 204 lbs (93 kg)

Features

Features Engine protection operator warning system: Low oil pressure/Over-rev/Overheat | Compatible with SmartCraft digital technology: Yes | Trim system: Gas assist/Power Tilt/Power Trim

Color

Colors Phantom Black

Product Photography