🚤 Mercury 300HP V8 FourStroke Outboard – Unleash Elite Marine Power
Description
The Mercury 300HP FourStroke outboard motor is the ultimate expression of performance, engineering excellence, and marine innovation. Designed for boaters who demand more—from raw power to smooth precision—the 4.6-liter V8 platform represents decades of Mercury’s leadership in outboard technology. This engine doesn’t just push boundaries; it redefines what it means to command the water.
Built on Mercury’s robust and efficient V8 architecture, the 300HP FourStroke delivers immediate throttle response, relentless acceleration, and exceptional midrange torque. Whether you’re cutting through offshore chop, towing water skiers, or cruising on a luxury center console, the Mercury 300HP ensures responsive power, unmatched control, and industry-leading fuel efficiency.
Mercury 300hp outboard motors for sale
At its core, this motor is more than brute force—it’s smart, adaptable, and intuitive. With technologies like Advanced Range Optimization (ARO) and Adaptive Speed Control (ASC), Mercury delivers the most fuel-conscious and precision-driven outboard in its class. The Idle Charge battery management system protects your onboard electronics by automatically increasing engine idle to recharge batteries when needed—critical for boats running GPS, fish finders, livewells, and entertainment systems.
Backed by Mercury’s legendary corrosion protection, durable stainless-steel components, and a multi-coat paint process, the Mercury 300HP is engineered to thrive in harsh saltwater environments and commercial-grade use. It’s also remarkably lightweight, making it easier to install and balance, and compatible with both mechanical and Digital Throttle & Shift (DTS) systems.
Whether you’re powering a tournament fishing boat, a high-performance bay boat, or a multi-engine offshore rig, the Mercury 300HP FourStroke gives you the confidence, control, and freedom to go farther, stay longer, and perform better.
⭐ Key Features
- ✅ High-Output 4.6L V8 Powerhead
A massive displacement V8 engine with naturally aspirated power offers rapid hole shots, outstanding acceleration, and powerful cruising at top speeds—even with heavy loads. - ✅ Advanced Range Optimization (ARO)
A closed-loop fuel management system that continuously adjusts air/fuel ratios for maximum efficiency and optimal economy, especially during long-range cruising. - ✅ Adaptive Speed Control (ASC)
Automatically maintains RPM regardless of water conditions or boat load. From towing to turning, ASC eliminates the need to adjust throttle manually, resulting in smoother, steadier handling. Mercury 300hp outboard motors for sale - ✅ Lightweight, Balanced Design
Mercury engineers have reduced engine mass without sacrificing strength, making this V8 the lightest in its class, contributing to improved fuel economy and boat stability. - ✅ Idle Charge Battery Management
Intelligent charging system increases idle speed to generate extra amps when onboard battery voltage drops—critical for electronics-intensive vessels. - ✅ Digital Throttle & Shift (DTS)
(On applicable models) Delivers smooth, precise, and instantaneous control through SmartCraft® systems and joystick piloting integration. Mercury 300hp outboard motors for sale - ✅ Advanced Corrosion Resistance
Features Mercury’s exclusive X-Guard paint, stainless steel internal fasteners, and saltwater-proven durability backed by industry-leading anti-corrosion engineering. - ✅ Vibration & Sound Dampening
Engine mounts and cowling are designed to reduce vibration and noise, ensuring a quieter, more comfortable boating experience at all RPMs. - ✅ Easy Maintenance Access
Tool-free top cowl service door, color-coded checkpoints, and integrated freshwater flush port make routine maintenance simple and fast. - ✅ Multi-Engine Ready
Perfect for twin, triple, or quad engine installations on performance catamarans, offshore cruisers, and commercial platforms.
📊 Technical Specifications
| Specification | Details |
|---|---|
| Model | Mercury 300HP FourStroke |
| Engine Type | V8, 4-Stroke, DOHC 32-Valve |
| Displacement | 4,588 cc (4.6 Liters) |
| Horsepower | 300 HP |
| Induction | Naturally Aspirated |
| Full Throttle RPM Range | 5200–6000 RPM |
| Fuel System | Electronic Fuel Injection (EFI) |
| Ignition System | SmartCraft PCM Digital |
| Gear Ratio | 1.85:1 |
| Gear Shift | Forward – Neutral – Reverse |
| Starting System | Electric Start |
| Steering Compatibility | Mechanical, Hydraulic, Digital, Joystick (DTS) |
| Shaft Lengths Available | 20″, 25″, 30″ |
| Trim & Tilt | Power Trim and Tilt |
| Exhaust | Through-Propeller |
| Cooling System | Water-Cooled with Thermostat |
| Alternator Output | 85 Amps Total / 60 Amps Charging |
| Dry Weight | Approx. 527 lbs (varies by shaft & rigging) |
| Corrosion Protection | X-Guard Paint, Anodes, Stainless Steel Hardware |
| Fuel Type | 87 Octane Unleaded Gasoline |
| Oil Type | SAE 10W-30 Mercury Marine Oil |
| Emissions Compliance | EPA, CARB 3-Star, EU RCD Certified |
| SmartCraft Compatible | Yes – with VesselView, DTS, Joystick Piloting |
| Warranty | 3-Year Factory Warranty (Extendable) |
🛶 Who Is the Mercury 300HP FourStroke For?
- Offshore Fishermen – Get on plane fast and power through waves effortlessly with a robust, torque-heavy V8.
- Recreational Boaters – Ideal for pontoons, bowriders, and performance center consoles that need a mix of comfort, power, and electronics support.
- Commercial Users – Built for longevity, low maintenance, and continuous operation under stress.
- Performance Enthusiasts – Enjoy powerful holeshot, clean acceleration, and razor-sharp throttle response for watersports or long-range cruising.
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