Mercury 225HP 225XL 4-Stroke Outboard – 25″ Shaft
Featuring 225 horsepower, four-stroke operation, and a 25-inch shaft, the Mercury 225XL supports compatible offshore transoms. Its engine output provides substantial propulsion, while correct shaft matching helps maintain efficient thrust transfer and stable handling.
Description
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Mercury 225HP 225XL 4-Stroke Outboard Specs
| Brand | Mercury Marine |
| Full Model Code / Part Number | 225XL 4-Stroke (25" 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 | XL: 25 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 225XL
Is Mercury 225XL a four-stroke?
Yes. The Mercury 225XL is a 225-horsepower four-stroke outboard with a 25-inch shaft. Its electronic fuel injection system controls fuel delivery across operating conditions, while the configuration suits compatible tall-transom boats requiring a high performance outboard motor. Confirm controls, steering, battery, wiring, fuel, and package contents.
What boats fit its shaft?
Boats designed for a matching 25-inch transom are the intended application. Measure the hull before purchase because incorrect shaft length can affect cooling-water pickup, gearcase depth, propeller immersion, steering response, and trim. Accurate measurement supports this ready to bolt marine outboard installation.
What should buyers verify?
Buyers should verify horsepower suitability, transom height, engine weight, steering hardware, controls, battery capacity, wiring, fuel supply, gauges, and package contents. A 25-inch shaft does not guarantee universal fitment. Confirm the boat’s maximum rated horsepower and follow Mercury installation documentation before repowering or operating the engine.













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