Description
The Mercury 4.6L V8 250hp FourStroke outboard represents the pinnacle of engineering excellence in marine propulsion. As a product of decades of innovation and trusted performance, this high-displacement V8 is built to deliver legendary power, class-leading fuel efficiency, and an ultra-refined on-water experience like no other. Whether you’re chasing offshore gamefish, towing skiers, or simply cruising with the family, this engine offers the power, responsiveness, and reliability you demand.
Mercury’s advanced FourStroke technology ensures that every element—from the engine block to the smallest sensor—is fine-tuned to provide unmatched versatility and durability. With a robust 4.6-liter V8 platform, the 250hp FourStroke delivers immediate acceleration, confident top-end performance, and adaptive handling that adapts seamlessly to your boating style.
From narrow rivers to vast oceans, the Mercury FourStroke 250hp thrives across every environment and vessel type. It’s engineered not just for speed, but also for comfort, longevity, and intelligent control, offering features that enhance fuel economy, extend battery life, and provide smoother operation under all conditions.
The result is a smart, high-performance outboard that is lighter, stronger, and more efficient than competitors in its class—backed by Mercury Marine’s legacy of innovation and global service support.
⭐ Key Features
- ✅ 4.6L V8 Engine – Naturally Aspirated Muscle
Offers massive displacement for immediate torque, faster planing, and sustained high-speed cruising—ideal for heavy boats and offshore runs. - ✅ Advanced Range Optimization (ARO)
Closed-loop fuel control system that dynamically adjusts the air/fuel ratio to deliver maximum efficiency without sacrificing performance. - ✅ Adaptive Speed Control (ASC)
Industry-first technology that automatically maintains engine RPM even as water conditions or boat load change—no need for constant throttle adjustments in turns, chop, or towing. - ✅ Lightweight by Design
Mercury’s proprietary engineering allows for weight savings at every level. This model is the lightest V8 250hp outboard in its class, increasing efficiency and improving handling. - ✅ Smart Charging with Idle Charge Technology
Automatically monitors battery voltage and increases idle RPM when needed to recharge batteries—perfect for boats running multiple electronics, livewells, or sound systems. - ✅ Digital Throttle & Shift (DTS) Compatible
Provides silky-smooth control, instant throttle response, and integration with SmartCraft® digital displays (on compatible models). - ✅ Vibration-Dampening Mounting System
Reduces engine noise and vibration transfer to the hull for a more comfortable and quiet boating experience. - ✅ Freshwater Flush System
Makes it easy to rinse the cooling system after saltwater use, helping extend the engine’s life. - ✅ Advanced Corrosion Protection
Mercury’s exclusive X-Guard anti-corrosion system, multi-layer paint, and stainless-steel components offer enhanced saltwater durability. - ✅ Industry-Leading Warranty
Backed by Mercury’s 3-year limited factory warranty, with extended coverage options available for peace of mind.
📊 Technical Specifications
Specification | Detail |
---|---|
Model | Mercury 4.6L V8 250hp FourStroke |
Engine Type | 4-Stroke V8, 32-Valve, DOHC |
Displacement | 4,588 cc (4.6 Liters) |
Horsepower | 250 HP |
Full Throttle RPM Range | 5200–6000 RPM |
Induction System | Naturally Aspirated |
Fuel Delivery System | Electronic Fuel Injection (EFI) |
Ignition System | SmartCraft PCM Digital |
Starting System | Electric Start |
Gear Ratio | 1.85:1 |
Gear Shift | F-N-R |
Steering | Remote (Hydraulic, Mechanical, or Digital) |
Shaft Length Options | 20″, 25″, 30″ |
Exhaust System | Through Propeller |
Trim & Tilt | Power Trim & Tilt |
Alternator Output | 85 Amps Total / 60 Amps Net Charging Output |
Fuel Type | Unleaded Gasoline (Min. 87 Octane) |
Oil Type | Mercury 4-Stroke Marine Oil 10W-30 |
Cooling System | Water-Cooled with Thermostat |
Corrosion Protection | X-Guard Coating, Stainless Fasteners, Anodes |
Dry Weight | ~505 lbs – 527 lbs (Varies by shaft/config) |
Emissions Compliance | EPA, CARB 3-Star, EU RCD Certified |
Digital Systems | SmartCraft, DTS, VesselView Compatible |
Warranty | 3-Year Limited Factory Warranty |
🛶 Who Is This Engine For?
- Offshore Anglers – High torque and broad powerband for quick planing and confident cruising across long distances.
- Recreational Boaters – Ideal for center consoles, bowriders, pontoons, and larger family boats with modern electronics.
- Performance Enthusiasts – Lightweight V8 responsiveness and intelligent control make it a dream for wakeboarding, waterskiing, and high-speed cruising.
- Commercial Operators – Designed for dependability, long-term reliability, and ease of maintenance with onboard diagnostics.
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