Intuitive, innovative features

Precise control
The 2.5 and 3.5hp Mercury FourStroke engines feature a hold-forward gear engagement function with 360 degree steering angle for full thrust in all directions.

Easy start
An automatic decompressor relieves cylinder pressure, reducing the force required on the crank to get the engine going.

Operation in shallow water
Multiple trim positions improve performance and enable shallow water operation.

Easy to carry
Mercury FourStroke 4.5 and 6hp engines have an integral fuel tank with an external fuel shut-off valve and the ability to connect to an optional portable fuel tank. With the onboard fuel tank, the outboard does not need to be connected to another fuel tank on the boat. However, for those who cover marathon distances with the boat, an optional portable fuel tank can be connected in a fraction of a second.

Low weight and affordable price are not their only qualities

• For outboards in this horsepower class, the most important "qualitative" is portability, which is why Mercury's 2.5-6hp FourStroke engines are among the lightest outboards in this class. Every Mercury FourStroke portable engine is equipped with a host of features, such as an automatic hook-lock mechanism when tipping or a conveniently integrated fuel tank. These FourStroke engines undergo the same anti-corrosion build-up processes as our higher horsepower products.
• These small outboards have great features. From multiple trim and shallow water settings (on 4-5-6hp models) to fully 360-degree rotatable bows (on 2.5-3.5hp models), you'll find the performance and the flexibility you need for every occasion.
• Starting is easy, thanks to automatic decompression that relieves cylinder pressure at engine start-up, resulting in less cranking force required to get the engine going. Thanks to their light weight and conveniently placed large carrying handles, the power reaches your boat without any problems at all. And because these lightweight outboards meet our rigorous testing standards, they're guaranteed to give you the high reliability that all Mercury outboards are known for fourstroke 2.5 etc.