This is the only engine in the 40 hp class to offer DOHC performance, and also the only engine in its class to incorporate a maintenance-free, oil-bathed timing chain, which provides the outboard with increased durability and maintenance free operation. With larger displacements for increased power and performance, Suzuki's Lean Control System for improved fuel economy and designs that are more compact and lighter in weight than the predecessor, the new DF40A engines also incorporate the Suzuki Troll Mode System. The Boating Writers of America presented Suzuki Marine with the NMMA Innovation Award for the DF40A/DF50A during the 2011 Miami Boat Show.



Engine Type 4 – Stroke DOHC 12 - Valve
Fuel Delivery System Easy Star System
Transom Height mm (in.) L: 508 (20)
Starting System Electric
Dry Weight kg (lbs.): S 102.0 (225), L 104.0 (229)
No. Of Cylinders In line - 3
Piston Displacement cc (cu. in.) 941 (57.4)
Bore X Stroke Inches (mm) 72.5 x 76 (2.85 x 2.99)
Maximum Output Kw (HP) / RPM 29.4 / (40)
Operating Range (RPM) 5000 - 6000
Steering Remote (Tiller Kit Optional)
Oil Pan Capacity liters (U.S. / Imp qts.) 2.9 (2.7)
Ignition System Fully-Transistorized
Alternator 12V 19A
Trim Method Power Trim and Tilt
Gear Ratio 2.27:1
Gear Shift F-N-R (Electronic)
Exhaust Through Prop Hub Exhaust
Propeller Selection (in.) 9 - 17