Used 2021 Mercury 300 HP Pro XS FourStroke V8 Outboard Motor – 20" Shaft

This used 2021 Mercury 300 HP Pro XS FourStroke delivers the combination of power, acceleration and efficiency expected from Mercury's high-performance Pro XS range. The 300 HP V8 is built around a 4.6-liter V8 powerhead, providing substantial torque and strong acceleration for bass boats, center consoles, fishing boats and other performance-oriented applications.

The Pro XS platform incorporates Mercury technologies including Transient Spark, Advanced Range Optimization (ARO), Adaptive Speed Control and SmartCraft compatibility, helping deliver strong hole shot, responsive throttle control and efficient cruising performance.

Specifications

• Condition: Used
• Year: 2021
• Manufacturer: Mercury
• Model: 300 Pro XS FourStroke
• Horsepower: 300 HP
• Engine Type: V8 4-Stroke
• Cylinder Configuration: 8-Cylinder V8
• Displacement: 4.6L / 4,576 cc
• Fuel System: Electronic Fuel Injection
• Fuel Type: Gasoline
• Starting System: Electric Start
• Shaft Length: 20"
• Trim System: Power Trim & Tilt
• Controls: Mercury Digital Throttle & Shift compatible
• Steering: Hydraulic / Power Steering compatible
• Full-Throttle RPM: 5,200–6,000 RPM
• Gear Ratio: 1.75:1
• Gearcase: Mercury Performance Gearcase
• Charging Output: Up to 85 amps at wide-open throttle
• Technology: SmartCraft, ARO, Transient Spark, Adaptive Speed Control
• Rotation: Standard
• Application: Bass Boats, Center Consoles, Fishing Boats, Offshore & Performance Boats
• SKU: 16345

Mercury's V8 300 HP platform uses a 4.6L displacement and a 5,200–6,000 RPM full-throttle range, while the Pro XS range adds performance-oriented tuning and technology.

Condition

This 2021 Mercury 300 Pro XS is a used, low-hour outboard offered as a premium repower option. The motor is professionally inspected and tested before shipment.

Its V8 configuration provides strong low- and mid-range torque, while the Pro XS calibration is designed around acceleration and performance.

Inspection Includes

• Engine performance checked
• Compression tested
• Electric start tested
• Power trim & tilt tested
• Gear shift operation checked
• Charging system checked
• Cooling system checked
• General mechanical inspection
• Propeller inspected
• Ready for installation

What's Included

This Mercury 300 Pro XS is supplied as a complete, ready-to-mount-and-run package.

Package includes:

• Mercury 300 Pro XS 300 HP V8 outboard
• Controls
• Propeller
• Batteries
• Fuel tank
• Fuel line
• Applicable digital gauges/display
• Wiring and rigging components
• Engine stand

Shipping Information

Freight shipping is available from EZ Boats Marine, 12819 State Route 235, Lakeview, OH 43331.

For an accurate freight quote, please provide:

• Country
• ZIP/postal code
• Commercial or residential delivery address
• Whether a loading dock is available
• Whether liftgate service is required

Customer pickup is also available by appointment.

Every outboard motor is professionally packaged and securely protected for transportation before shipment.

Important Shipping Notice

Please inspect all shipments carefully for potential damage during transit.

If damage is found:

• Clearly note the damage on the Bill of Lading
• Have the delivery driver acknowledge and sign the damage report
• Keep a copy of the signed Bill of Lading
• Photograph the product and packaging
• Keep the product and packaging until the carrier completes its inspection or claim

Warranty

🛡️ 1-Year Mechanical Warranty

This used Mercury 300 Pro XS includes a 1-Year Mechanical Warranty from EZ Boats Marine.

The motor is professionally inspected and tested before shipment.

Why Buy from EZ Boats Marine?

• 2021 Mercury 300 Pro XS FourStroke
• 300 HP V8
• 4.6L displacement
• 20" shaft
• Low-hour used outboard
• Pro XS performance technology
• SmartCraft compatibility
• Complete ready-to-mount-and-run package
• 1-Year Mechanical Warranty
• Freight shipping available
• Customer pickup available
• Customer support before and after purchase