FourStroke 250-300hp
Mercury 4.6L V8 250 and 300hp FourStroke outboards deliver legendary performance and an all-around elevated boating experience. Reliability. Comfort. Power. Handling. Easy ownership. Flexibility. For any body of water and across a wide variety of boats, every facet of a Mercury FourStroke outboard is engineered to ensure you make the most of your time on the water.
Adaptive Speed Control
The Adaptive Speed Control feature lets you maintain engine rpm despite changes in load or conditions. Climbing large swells is easier. Cruising at low speeds is smoother. Carving out tight turns is effortless.
Smooth and Quiet
Featuring a large muffler and a vibration-dampening cowl design, Mercury V8 FourStroke outboards deliver an exceptionally smooth, quiet ride at any speed.
Easy to Maintain
The exclusive Top Cowl Service Door simplifies routine maintenance, letting you check or add engine oil without removing the top cowl. An hour-based maintenance schedule decal is located under the cowl, providing a quick overview of routine maintenance.
Ample Charging Output
A powerful alternator delivers 85 amps of charging power at wide-open throttle – perfect for keeping onboard electronics running long into the fun.
Industry-Exclusive Battery Management Technology
When needed, the idle charge battery management system works for you by monitoring battery voltage and adjusting engine rpm at idle to boost alternator output.
SmartCraft® | The Power to Do More
Mercury SmartCraft® digital technologies refine the entire boating experience to ensure every day on the water reaches its full potential. From intelligent gauges and displays to advanced systems that make boat control easy, SmartCraft gives you the power to do more with your time on the water.
Gauges
SmartCraft digital gauges are a convenient solution for staying in the know. They offer at-a-glance access to precise engine data and select SmartCraft controls on a compact digital interface.
Controls
Enjoy instantly responsive control and precise handling with Mercury digital control systems. Whether driving or docking, every task is made easier so you can take the helm with confidence.
Displays
With SmartCraft, you can integrate your engine with a compatible onboard display, gaining instant access to performance data and SmartCraft controls on the screen you use most.
Connectivity
The Mercury Marine app is the ultimate boating companion. It transforms your mobile device into a hub for monitoring data, connecting with a dealer and viewing helpful content.
Characteristics
| MODEL | FourStroke 250hp | FourStroke 300hp |
|---|---|---|
| Horsepower | 250 | 300 |
| Alternator amp / Watt | 85 amp (1071 Watt) with Idle Charge | 85 amp (1071 Watt) with Idle Charge |
| Colors | Black / Cold Fusion White / Warm Fusion White / Pe- arl Fusion White | Black / Cold Fusion White / Warm Fusion White / Pe- arl Fusion White |
| Smartcraft compatible | Yes | Yes |
| Displacement (L) | 4.6L | 4.6L |
| Dry weight *Lightest model available | 527 lbs / 239 kg | 527 lbs / 239 kg |
| Engine type | V8 | V8 |
| HP / kW | 250 / 184 | 300 / 221 |
| Recommended fuel | Unleaded Regular 87 Octane Minimum (R+M/2) or 90 R- ON 10% Ethanol Maximum | Unleaded Regular 87 Octane Minimum (R+M/2) or 90 R- ON 10% Ethanol Maximum |