Mercury F300 – 300HP V8 FourStroke Outboard Engine – Powerful, Lightweight & Quiet

The Mercury F300 is Mercury’s flagship four-stroke outboard (outside of the Verado line), introduced in 2018. Its 4.6-liter V8 powerhead delivers an unmatched combination of high horsepower, large displacement, and low weight. With a full 300 horsepower on tap, the F300 provides explosive acceleration and a high top-end speed – perfect for propelling large boats even in demanding conditions. Despite its impressive power, this V8 runs remarkably smooth and quiet, with up to 30% less vibration at idle and significantly lower noise at cruising speed compared to competing engines. This results in maximum comfort during operation, allowing you to enjoy long days on the water without fatigue from noise or harsh vibrations.

Designed with the owner’s convenience in mind, the Mercury F300 features an exclusive top cowl service door that lets you quickly check and add engine oil without removing the entire cowling – making routine maintenance fast and simple. The engine’s electrical system is equally advanced: the powerful 85-amp alternator ensures your batteries stay charged and your onboard electronics stay powered even at wide-open throttle. At low rpm, Mercury’s industry-first idle charge system will automatically increase idle speed if it senses low battery voltage, providing extra charging output when needed.

The Mercury F300 can be rigged with either digital (DTS) or mechanical throttle and shift controls to suit your preference. It’s available in the classic Phantom Black or a sleek Cold Fusion White finish to match your boat’s style. Thanks to its relatively compact dimensions and class-leading light weight, this 300HP outboard is excellent for new installations on fresh builds as well as repowering older vessels seeking an upgrade in performance.

Mercury recommends the F300 for larger boats around 8–10 meters in length – for example, offshore fishing vessels, high-performance RIB boats, or cruising craft that demand maximum power from a single engine. For even bigger boats or added peace of mind, twin F300 installations (2 x 300 HP) are common, providing a combined 600 HP of thrust for truly impressive performance. The Mercury F300 is a no-compromise choice for captains who demand top-tier performance, reliability, and cutting-edge technology on board.

• Ideal single-engine solution for 8–10 m boats, delivering high speeds and ample thrust even for heavy hulls
• Can be twin-mounted (2 x 300 HP) on larger vessels – a total of 600 HP for breathtaking performance
• Suited for big RIBs, offshore fishing boats, and cruising yachts requiring maximum reliability and power from an outboard
• Recommended for boaters seeking a premium engine with state-of-the-art technology, minimal vibration, and optimized fuel efficiency