2005 Mercury Marine® Fourstroke 40 HP EFI

2017 Mercury Marine® Fourstroke 40 HP EFI

Forget everything you know about FourStroke outboards. Ours change the game. Completely. They’re tougher, smaller, and lighter than any other FourStroke on the water. With a combination of performance and efficiency that will take your time on the water to a whole new level.

The most popular outboards on the water because they deliver what every boater wants – no-worry reliability and outstanding performance.

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.

Held to a Higher Standard

Enhanced fuel injection for boosted efficiency

Features may include:

• 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.

• The high-displacement, long-stroke, four-cylinder, single-overhead cam design provides optimum power and a smooth ride with Command Thrust models.

• The 40hp manual start, long shaft (20" / 508mm), tiller steer model is also available with a thumbscrew mounting bracket. This bracket reduces the time and effort needed to install or remove the outboard from a boat's transom.

• The optional center-mounted Big Tiller offers optimal control. A longer tiller grip incorporates a convenient power trim switch, the shift lever is close at hand, and an optional digital troll control adjusts engine speed as low as 700 rpm in 10-rpm increments.

• 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!

• Mercury Electronic Fuel Injection (EFI) delivers reliable turnkey starts, improved fuel efficiency, instant throttle response and protection against low-quality-fuel problems.

• An 18-amp high-output alternator keeps batteries charged and fishing electronics humming.

• The advanced design of the Mercury® Spitfire® aluminum propeller combines four aggressive blades with high rake angles and extra cup for tenacious holding and 25% quicker acceleration, with no loss in top speed compared to a three-blade Mercury Black Max® propeller of the same pitch.

• The advanced design of the Mercury Spitfire Pontoon four-blade aluminum propeller maximizes blow-out resistance, with extra blade area for outstanding hold in turns and extra thrust around the dock that pontoon boaters need and demand. The Spitfire Pontoon propeller is available for 40 - 60hp Command Thrust engines in 10-, 11- and 13-pitch sizes.