Suzuki DF115B – 115 HP Outboard Engine – Lightweight, Efficient & Versatile

The Suzuki DF115B is designed to elevate the 115 HP class to a new level of efficiency and convenience. Sharing the same 2.0-liter block as the larger DF140B, this motor benefits from ample displacement and robust construction, but it’s tuned for a slightly lower peak output – 115 HP, which brings some advantages. The engine can run at a more “relaxed” state at equivalent speeds, potentially translating to longer life and less stress on components. At the same time, the increased compression ratio to 10.6:1 (compared to previous models) allows the DF115B to squeeze maximum energy out of every drop of fuel – acceleration is noticeably improved and your boat’s top speed gets a boost.

One of DF115B’s greatest strengths is its versatility. This engine is equally at home on a variety of boats: it can provide a strong punch for mid-sized powerboats, deliver reliable and economical operation for fishing vessels, or serve faithfully on workboats and law enforcement craft. With significantly less weight than some competing 115 HP models, it reduces transom load and improves handling. A boat powered by the DF115B will feel more agile during maneuvers and throttle changes.

The Suzuki DF115B comes equipped with all the modern systems characteristic of Suzuki’s new generation outboards. The Lean Burn control optimizes fuel efficiency at all times – during steady cruising you can expect markedly lower consumption than an older 2-stroke of similar power, as well as cleaner emissions. The electronic multi-point fuel injection (EFI) delivers precise fuel amounts to each cylinder, which makes the engine’s operation smooth, starting easy, and throttle response immediate. The DF115B runs very quietly for a 4-cylinder; its low vibration and noise mean a more enjoyable time on board, without passengers being fatigued by engine drone.

In terms of reliability and maintenance, this model continues Suzuki’s tradition. The self-tensioning timing chain eliminates the need for belt replacements and ensures the valves stay perfectly timed throughout the engine’s life. The special anti-corrosion coating protects the engine and gearcase from rust and electrolysis, prolonging its lifespan even if the boat stays in water year-round. The built-in water detecting sensor in the fuel filter adds extra peace of mind – it warns you early if your fuel is contaminated, so you can take action before any issue arises.

In the end, the Suzuki DF115B offers a modern, eco-friendly alternative to older two-strokes in this range. It combines better fuel economy, quieter and smoother operation, and significantly lower emissions – all while delivering the dependable 115 horsepower you need in any situation on the water.

• Recommended for: Boats ~13–17 ft (4–5 m) – family runabouts, mid-size fishing boats, utility or patrol craft – that require a reliable 115 HP powerplant without excessive fuel burn.
• Versatile choice: The DF115B is suited for both recreational purposes (watersports, cruising, fishing) and professional tasks (e.g. survey boats, rescue vessels), thanks to its mix of fuel efficiency and responsive performance.
• Ideal for repowering an older engine: If you’re upgrading a boat equipped with an outdated 90–115 HP two-stroke, the DF115B will deliver noticeably lower fuel consumption and noise without sacrificing power – resulting in a better overall on-water experience and performance.