2018 Suzuki 40 HP DF40A Outboard Motor

The 2018 Suzuki 40 HP DF40A is a four-stroke outboard with a DOHC 12-valve head and an oil-bathed timing chain, a maintenance detail that sets it apart from engines using an external timing belt. Suzuki's Lean Control System and Troll Mode System round out a design built for fuel efficiency as much as output.

What it is for

At 40 HP with a displacement of 941 cc (57.4 cubic inches), this motor suits boats sized for a mid-power four-stroke: jon boats, small pontoons, and aluminum fishing boats that call for electric start and remote steering rather than tiller control. Multi Point Sequential Electronic Fuel Injection and a fully transistorized direct ignition system support consistent starts across temperatures.

What to check before buying

• Transom height: the recommended mount is 20 inches, so measure before ordering.
• Electrical: a 12V, 19A alternator is built in for charging and accessories.
• Oil and fuel: oil capacity is 2.9 quarts and the included tank holds 3.1 gallons.

What comes with it

This package ships with the fuel tank, fuel line, owner's manual, an aluminum propeller, and a tool kit, plus Suzuki's 3-Yr Warranty on the engine.

Does it have power trim? Yes, power trim and tilt is standard on this DF40A.

What is the gear ratio? 2.27:1, geared for the torque curve of this 40 HP block.

Weighing 229 pounds, the DF40A is built lighter than earlier 40 HP Suzuki designs while adding displacement for the power curve. Buyers upgrading from a carbureted motor will notice the EFI system removes most cold-start fuss, and the fresh water flushing port simplifies end-of-day maintenance. Suzuki outboards