Suzuki DF100B – 100 HP Outboard Engine – Ultra Lightweight & Highly Efficient

The Suzuki DF100B brings 100 HP of power into a lower weight class, giving owners of smaller boats the chance to enjoy excellent performance without weighing down the stern. This model was developed as a lightweight alternative to standard 100 HP outboards, using Suzuki’s proven 1.5-liter inline-4 engine (the same powerplant found in the DF70A/80A/90A models). The result is an extremely low dry weight – about 157 kg – meaning the DF100B is comparable in mass to typical 70–90 HP engines. For small and mid-sized boats, that’s significant: the engine’s lighter weight improves balance, reduces how deep the stern sits in the water, and makes handling easier. With the DF100B, your boat will exhibit snappier acceleration and shorter stopping distances when you pull back the throttle, compared to a heavier engine of the same horsepower.

Despite its compact size, the DF100B delivers respectable power and torque. This allows 12–16 ft boats, such as inflatable RIBs, aluminum fishing boats, or small fiberglass runabouts, to reach optimal speeds and carry passengers and cargo with confidence. The engine employs Suzuki’s Lean Burn system, which proves its worth every mile – on a typical fishing trip or cruise you’ll notice savings that extend the time between refuels. With 100 HP on tap, you can comfortably tow water toys like banana boats or even get into light water skiing with smaller skiers, all without the engine feeling strained.

The DF100B also shines in ease of use and maintenance. Electronic ignition and fuel injection ensure reliable starting even on cool mornings, and the automatic idle enrichment (ECM-controlled choke) means you don’t have to fiddle with a manual choke during startup. The engine idles smoothly, which is especially nice for trolling or harbor cruising – there are no excessive vibrations to spoil the experience. Like its larger siblings, the DF100B features a self-tensioning timing chain, which translates to less time in the shop and more time on the water. The anti-corrosion treatment shields the engine from the ravages of saltwater, and the well-designed cooling system ensures the motor stays at optimal temperature even during extended high-speed runs.

For owners repowering an older boat or looking to transition from a 2-stroke to a 4-stroke, the Suzuki DF100B offers a very compelling solution: you get the quietness, economy, and eco-friendliness of a modern four-stroke without sacrificing power – and all in a significantly lighter unit that’s easy to install and transport. The DF100B gives your boat confident, lively performance and is engineered to put your enjoyment and peace of mind first when you’re out on the water.

• Recommended for: Small and mid-sized boats (~11–16 ft) – compact RIBs and inflatables, aluminum jon or fishing boats, lightweight fiberglass runabouts – where minimizing engine weight is crucial for safety and performance.
• Ideal for max power on a small transom: The DF100B is an excellent choice if your boat is rated for ~100 HP but the physical size and weight of standard 100 HP engines are an issue – this model delivers the needed power in a smaller, lighter package.
• Perfect for extended adventures: With its fuel efficiency and reliable operation, the DF100B enables all-day excursions, boat camping, or long fishing trips without worries about excessive fuel use or fatigue from noise and vibration.