Mercury 300XL 300HP – Verado Four Stroke 25-Inch Shaft

Mercury 300XL Verado 300HP V8

The Mercury 300XL Verado is a premier 300HP FourStroke outboard engineered for high-transom offshore vessels requiring a practical in digital control and ride refinement in the US maritime market. Featuring a large-displacement 4.6L V8 32-valve DOHC powerhead and weighing 600 lbs, this engine utilizes the Advanced MidSection (AMS) to isolate vibration from the hull. This 25-inch long shaft model is configured with standard rotation and integrated electro-hydraulic power steering. Our reliable marine outboard engines provide the mechanical dependability and silent operation needed for professional offshore maritime tasks.

Maximum operational performance for the Mercury 300HP Verado is maintained between 5200 and 6000 RPM, supported by a 115 Amp alternator for superior electrical capacity. The 1.75:1 gear ratio helps support the engine translates its V8 torque into immediate hole-shot acceleration and steady hull planing. Proudly manufactured in the USA, this corrosion-resistant unit features SmartCraft Digital Throttle & Shift (DTS) to helps support a quiet, comfortable ride during marine saltwater excursions.

Technical Specifications of Mercury 300XL Verado

- The 4.6L V8 32-valve DOHC architecture provides displacement for strong acceleration and low-end torque.
- Advanced MidSection (AMS) isolates engine noise and vibration, providing the smoothest ride in the 300HP class.
- Integrated Electro-Hydraulic power steering offers hyper-responsive, automotive-like control for large offshore vessels.
- SmartCraft Digital Throttle & Shift (DTS) replaces mechanical cables with digital data for flawlessly smooth gear engagement.
- A class-leading 115 Amp alternator delivers 1449 Watts of charging power for high-draw onboard electronics and stabilizers.
- SmartCraft PCM 112 Digital Inductive ignition provides exact spark timing for flawless idling and rapid hole-shot performance.

Advanced MidSection (AMS) Refinement

The inline V8 Verado platform leverages the Advanced MidSection to cradle the powerhead, absorbing the noise and vibration that typically transfers to the boat’s hull. This results in a premium boating experience, allowing for clear conversation at the helm even when cruising at high offshore speeds through the American coastal environment.

Integrated Electro-Hydraulic Steering

Mercury’s integrated power steering system removes the need for external hydraulic cylinders and hoses on the transom. This digital drive-by-wire steering provides captains with, precision control, which is vital when navigating through treacherous coastal inlets or precisely docking large center consoles.

High-Capacity 115A Alternator

With a 115 Amp alternator, this V8 engine generates 1449 Watts of charging power. This robust electrical output keeps multiple battery banks charged, ensuring high-draw radar systems, gyrostabilizers, and entertainment systems remain flawlessly operational during long offshore transits.

Mercury Factory Warranty

Mercury Marine protects this 300HP Verado outboard with a comprehensive 3-Year Limited Warranty for American boat owners. This factory-backed coverage covers structural and mechanical defects, reflecting a commitment to quality and long-term maritime reliability that offshore mariners depend on daily.

High-Transom Offshore Match

This 25-inch Verado outboard is a practical power solution for offshore center consoles, deep-V walkarounds, and large fiberglass fishing boats. It provides the sustained high-end thrust needed for navigating difficult coastal tidal flows while offering maneuverability and silent operation.

Maintenance & Longevity

Maintaining clean oil in the 7.0L integrated wet sump lubrication system is vital for preserving tight engine tolerances over time. Always flush the cooling system with fresh water after every saltwater outing.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.