Description
2023 Mercury 25HP FourStroke Outboard is a lightweight and reliable marine engine designed for aluminum fishing boats, jon boats, inflatables, utility boats, skiffs, and small recreational vessels. Built on Mercury’s efficient inline-3 four-stroke platform, this outboard combines smooth operation, electronic fuel injection (EFI), strong low-end torque, and low fuel consumption. Mercury engineered the 25HP lineup for easy portability, dependable everyday use, quiet operation, and reduced maintenance requirements while maintaining excellent durability in both freshwater and saltwater environments.
Key Features
25 Horsepower Four-Stroke Engine
Inline 3-Cylinder Engine Platform
Electronic Fuel Injection (EFI) System
500cc / 526cc High-Displacement Design
SOHC (Single Overhead Cam) Configuration
Compact Lightweight Construction
Manual & Electric Start Options
Tiller or Remote Steering Compatibility
Power Trim & Tilt Available
Advanced Mercury Tiller Handle Design
Quiet Low-Vibration Operation
Excellent Fuel Efficiency
Water-Cooled Thermostat-Controlled System
Through-Prop Exhaust System
Wet Sump Lubrication System
Forward / Neutral / Reverse Gear System
Heavy-Duty Marine Gearcase
Corrosion-Resistant Marine Construction
Saltwater Rated Components
SmartCraft Compatible (select models)
Easy Maintenance Access
No-Spill Oil Change System
External Fuel Tank System
Strong Low-End Torque Performance
Smooth Idle & Acceleration
Reliable Cold Starting Capability
Commercial & Recreational Use Compatibility
Long-Life Valve Train Design
Portable Carry-and-Go Design
Suitable for Heavy Loads & Utility Boats
Reduced Emissions Technology
Technical Specifications
- Engine Type: Inline 3-Cylinder Four-Stroke
- Horsepower: 25 HP
- Displacement: 500cc–526cc depending on variant
- Fuel System: Electronic Fuel Injection (EFI)
- Ignition System: CDI with electronic spark advance
- Starting System: Manual or Electric Start
- Steering: Tiller or Remote
- Cooling System: Water-Cooled with Thermostat
- Full Throttle RPM Range: 5000–6000 RPM
- Alternator Output: 15A–17A / 186W–210W
- Gear Ratio: 1.92:1 or 2.17:1 depending on model
- Fuel Tank: External 6.6-gallon fuel tank
- Shaft Lengths: 15″ Short and 20″ Long options
- Dry Weight: Approximately 132–171 lbs depending on configuration
- Trim System: Manual Trim or Power Trim & Tilt
- Fuel Type: 87 Octane Gasoline
- Propeller: 3-Blade Aluminum Propeller (varies by package)
