Mercury F115 – 115HP FourStroke Outboard Motor – Lightweight, Quiet & Efficient

The Mercury F115 sits in Mercury’s mid-range FourStroke lineup, yet by many measures it outperforms the competition. This 115HP engine boasts a 2.1L displacement, which is larger than that of many other 115HP outboards on the market. The larger engine means better torque, easier acceleration, and less strain on the engine at any given speed. At the same time, the Mercury F115 is extremely light – at about 163 kg for a 20” shaft model, it’s among the lightest 115s around, which contributes to less stern squat and overall better boat efficiency.

In operation, the Mercury F115 stands out for its very quiet and smooth running. From the optimized cowl design to special engine mounts – everything is geared toward minimizing noise and vibration. In fact, Mercury’s 75–115HP FourStroke models are quieter and smoother than any competing engines in their class. This makes the F115 especially attractive for anglers and boating enthusiasts who value peace and comfort on the water.

Mercury offers the F115 in a Command Thrust (CT) version as well – a special model with a larger gearcase and prop. This option is ideal if you plan to use the engine on a heavier boat (like a pontoon or workboat) – Command Thrust provides extra thrust and better low-speed handling without affecting top-end speed.

When it comes to reliability and maintenance, the F115 benefits from Mercury’s proven solutions: a filtered air intake that shields the engine from dust and salt, an anti-drainback oil system that ensures instant lubrication at startup, and SmartCraft compatibility, meaning you can connect the engine to modern digital gauges, monitoring systems, and protective features. Anti-corrosion measures (stainless components, a freshwater flush attachment, and special coatings) ensure a long life even with regular use in saltwater.

The Mercury F115 is a truly versatile engine, suitable for a multitude of applications. It is an ideal powerplant for 4.5–5.5 meter boats – such as aluminum fishing boats, small open center-console skiffs, mid-size RIBs and inflatables, as well as some lighter fiberglass day cruisers. Boats that need a gentle yet strong push – for example, for eco-touring or towing small water toys – also benefit from the F115’s confident thrust and midrange. With its low fuel consumption and durability, this engine is a favorite among many professional guides and enthusiasts who want dependable power without compromise.

• Perfect for 4.5–5.5 m boats: RIBs and inflatables, aluminum fishing boats, small center-console runabouts, and day-cruiser boats
• Command Thrust model available for heavier boats or pontoons – delivers extra thrust and improved handling at low speeds (when opting for the CT version)
• Extremely quiet with minimal vibration – the quietest engine in the 115HP class, which is valuable for fishing or peaceful cruising
• Built for durability: anti-corrosion technologies, filtered air, and the Engine Guardian system protect the motor and extend its life
• SmartCraft-compatible – integrates with Mercury’s digital gauges for monitoring and allows use of advanced features like Active Trim and maintenance alerts