Mercury Marine® Fourstroke 3.5 HP Handheld Reliability Portable power and thrust for exact operation. Popular with boaters everywhere. Because they can get you anywhere. Quiet, capable, and held to the highest standards. 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: Calculate your fuel savings The Mercury Fuel Savings Calculator will allow you to easily calculate the possible fuel savings of a Mercury FourStroke outboard! Choose how you use your boat, select the TwoStroke and FourStroke horsepower - and our tool will show your potential fuel savings. If you're looking to upgrade or add more power, you can even choose different FourStroke and TwoStroke horsepower options! Lightweight. Weighing just 38 and 57 pounds, respectively, our 2.5 - 3.5hp and 4 - 6hp FourStroke outboards are easy to lift and carry. 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. Precise Control. Mercury 2.5 and 3.5hp FourStroke engines feature neutral-forward shifting with 360-degree steering for full thrust in all directions.