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2019 Suzuki 40 HP DF40ATL2 Outboard Motor

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. During the 2011 Miami Boat Show, the Boating Writers of America presented Suzuki Marine with the NMMA Innovation Award for the DF40A/DF50A.



  • Multi Point Sequential Electronic Fuel Injection
  • Suzuki Lean Burn Control System
  • Suzuki Troll Mode System
  • Direct Ignition
  • Suzuki Easy Start System
  • Over-Rev. Limiter
  • Low Oil Pressure Caution
  • Fully Transistorized Ignition
  • Timing Chain
  • Fresh Water Flushing System
  • Power Trim and Tilt
  • Suzuki Anti-Corrosion System



  • Recommended Transom Height (inches): L: 20
  • Starting System: Electric
  • Weight (lb.): L: 229
  • Engine Type: DOHC 12-Valve
  • Fuel Delivery System: Multi Point Sequential Electronic Fuel Injection
  • Number of Cylinders: 3
  • Piston Displacement inches (cc): 57.4 (941)
  • Bore x Stroke inches (mm): 2.85 x 2.99 (72.5 x 76)
  • Maximum Output HP: 40
  • Operating Range (rpm): 5000 – 6000
  • Steering: Remote (Tiller Kit Optional)
  • Oil Pan Capacity quarts (liter): 2.9 (2.7)
  • Ignition System: Solid State Direct Ignition
  • Alternator: 12V 19A
  • Trim Position: Power Trim and Tilt
  • Gear Ratio: 2.27:1
  • Standard Propeller: Optional See Dealer
  • Propeller Selection: 9 – 17


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