Mercury 225HP 225L 4-Stroke Outboard – 20″ Shaft
The 225-horsepower Mercury 225L four-stroke outboard uses a 20-inch shaft for compatible lower-transom installations. Its four-stroke propulsion supports dependable cruising, while proper shaft length helps maintain propeller depth and efficient thrust delivery.
Description
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Mercury 225HP 225L 4-Stroke Outboard Specs
| Brand | Mercury Marine |
| Full Model Code / Part Number | 225L 4-Stroke (20" Shaft) |
| Country of Origin | USA |
| Engine Type & Configuration | 4-Stroke V6 (DOHC with 4-Valves per Cylinder) |
| Horsepower Output (HP / kW) | 225 HP (168 kW) |
| Displacement (cc / cu in) | 3400 cc (208 cu in) |
| Bore x Stroke (mm / in) | 92.0 x 86.0 mm (3.62 x 3.38 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5000 - 5800 RPM |
| Fuel Induction System | Electronic Fuel Injection (EFI) Computer Controlled with Sequential Multi-Port |
| Ignition System | SmartCraft ECM 0d Digital Inductive |
| Starting System | Electric Start with SmartStart Push Button |
| Steering System | Electro-Hydraulic Power Steering Compatible |
| Trim & Tilt System | Smart Craft Power Trim and Tilt |
| Gear Ratio & Shift Mechanism | 1.85:1 (Forward - Neutral - Reverse) |
| Exhaust System | Through Propeller |
| Recommended Transom Shaft Length | L: 20 inches |
| Alternator / Charging Output (Amps / Watts) | 85 Amp (Idle Charge Battery Management System) / 1071 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 87 Octane) / Mercury 4-Stroke Outboard Oil NMMA FC-W 25W-40 |
| Dry Weight (kg / lbs) | 216 kg / 475 lbs |
| Standard Warranty | 3 Years Limited Recreational Warranty |
Common Question of Mercury 225L
Is Mercury 225L a four-stroke?
Yes. The Mercury 225L is a 225-horsepower four-stroke outboard with a 20-inch shaft. Its electronic fuel injection system controls fuel delivery during starting, acceleration, and cruising. Confirm steering, controls, battery, wiring, fuel, transom strength, and package contents before installing this high performance outboard motor.
What transom fits its shaft?
A 20-inch transom is the intended match for this 225L configuration. Measure the boat before purchase because incorrect shaft length can affect cooling-water pickup, gearcase depth, propeller immersion, steering response, and trim. Correct measurement supports a properly installed ready to bolt marine outboard package.
What should buyers verify?
Buyers should verify horsepower suitability, shaft length, engine weight, transom capacity, steering hardware, control equipment, battery connections, wiring, fuel supply, gauges, and package contents. A 20-inch shaft does not guarantee universal fitment. Follow Mercury installation documentation and the hull manufacturer’s requirements before repowering or operating the engine.
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