Mercury Marine® Fourstroke 4 HP Power Tender and Skiffs. Effortlessly. 57 pounds of agile performance. Experience nimble maneuvering and an output far beyond its size. Multiple trim positions. Underwater vents for quiet operation. FourStroke technology and Mercury. Always moving forward. With boater-driven innovations and technologies. Like electronic fuel injection. On-board digital monitoring that protects your engine. And a total commitment to corrosion protection utilizing hard-coat anodizing and a superior multi-step paint process. Mercury FourStroke engines have consistently set the bar for clean, quiet performance and low fuel consumption. Plus, no one has more models to fit your needs. Features may include: Lightweight. Weighing just 38 and 57 pounds, respectively, our 2.5 - 3.5hp and 4 - 6hp FourStroke outboards are easy to lift and carry. Generate Power. Convenience and performance you can count on. 4 amp alternator to charge a battery: exhaust relief holes and 6" prop for improved handling when reversing heavy boats; even an added rectifier to power small external lights. A 5hp FourStroke that powers your boat. Shallow Water. Multiple trim positions enhance performance and enable shallow-water operation. Easy to Start. Automatic decompression bleeds off cylinder pressure to reduce the pulling force required to start the engine. Quiet. Through-prop exhaust on all Mercury® 4 - 6hp FourStrokes exits underwater for quiet operation. Fueling Options. Mercury® 4, 5 and 6hp FourStrokes feature integral fuel tanks with an external fuel-shutoff valve, as well as a fuel-tank cap on top of the cowl. For extended range, these engines also can be connected to a remote fuel tank placed in the boat.