Mercury F50 EFI 50HP – Smooth & Efficient Outboard for 5–6m Boats

The Mercury F50 EFI is a 50HP four-stroke outboard known for its exceptionally smooth operation and fuel efficiency. Powered by the same 995cc inline 4-cylinder engine as the F60, the F50 is detuned to 50HP, providing robust performance with even less fuel usage. The EFI system precisely meters fuel for optimal combustion, eliminating the need for a choke and ensuring easy startup in all conditions. At idle, the F50 runs nearly vibration-free – the four-cylinder balance means minimal engine rumble, which is a big advantage for trolling or slow-speed cruising. When you open up the throttle, the engine’s broad torque curve delivers brisk acceleration and confident mid-range power, so your 5–6 meter boat gets on plane quickly and can handle additional passengers or gear without strain.

With a dry weight around 112 kg, Mercury F50 strikes an excellent balance between power and weight. It’s one of the lightest in its class for a 50HP, which helps improve your boat’s overall efficiency and handling. The engine is designed for quiet and clean running – Mercury’s low-noise intake and exhaust systems, combined with superior vibration damping, result in a pleasant boating experience where conversations and nature sounds aren’t drowned out by the motor. The F50 features a high-output alternator (18A) to keep your battery charged and electronics running, which is great for fishing boats with fishfinders, livewell pumps, or navigation equipment.

Mercury’s proven reliability is built into the F50. It has a freshwater flush port for easy post-use rinsing, and an advanced engine protection system (monitoring oil pressure, temperature, and RPM) to prevent damage. Maintenance is user-friendly with color-coded service points and an oil drain system that minimizes mess. Whether you’re using it on an aluminum fishing skiff, a rigid inflatable boat, or a small cabin cruiser, the Mercury F50 delivers trusted performance and efficiency. It’s fully compatible with Mercury SmartCraft gauges for monitoring engine data and can be equipped with either a manual tiller or remote steering controls, depending on your boat’s configuration. Overall, the F50 EFI is a versatile outboard that will serve both recreational boaters and professional users (such as fishing guides or marina operators) with equal dependability.

Use Cases & Recommendations:
– Optimal for 15–20 ft (5–6 m) boats including aluminum fishing boats, inflatable RIBs, and small open console boats, where smooth and quiet operation is a priority
– Great for trolling and fishing, thanks to its almost vibration-free idle and low fuel burn – you can troll for hours without spooking fish or draining the tank
– Suitable for family leisure boating on lakes or coastal waters, providing reliable power for day trips, tubing, or beach hopping
– Ideal for boaters seeking low maintenance and high reliability – the F50’s EFI and self-diagnostic systems reduce hassle and downtime
– A smart repower choice to improve efficiency and noise levels on older boats originally equipped with carbureted two-stroke engines (the F50 offers cleaner emissions and better fuel economy)