4 Stroke

2.5-6HP
Calculate your fuel savings
The Mercury Fuel Savings Calculator will allow you to easily calculate the possible fuel savings of a Mercury FourStroke outboard!

8-9.9HP
Enhanced Features.
The Mercury 8 and 9.9hp FourStroke outboards include:
New three-position choke and no primer button improve starting, simplify the starting procedure and allow the engine to warm up faster

15-20HP
All-in-one Performance
Intuitive maneuvering for precise control.

25-30HP
Dependable starts and performance.
Battery-free Electronic Fuel Injection (EFI) on Mercury 25 – 30hp FourStroke models delivers consistently easy starting, crisp throttle response, increased fuel economy and outstanding overall performance.

40-60HP
Smooth and Strong Performance.
A compact, single-overhead-cam design and long piston stroke give Mercury 40 – 60hp FourStroke outboards more low-end torque for excellent acceleration, even when pushing a heavy load.

75-115HP
Worry-free
The same lifetime maintenance-free valvetrain design found in our 150 FourStroke engines makes the 75-115hp FourStroke outboards incredibly durable.

150HP
Compact and Versatile.
It’s the lightest 150hp four-stroke outboard on the market. Smart design makes the 150hp Mercury FourStroke nearly 20 pounds lighter than its closest four-stroke competitor