DF4

The DF4 brings 4-stroke performance and efficiency to portable outboards. Compact and lightweight, the DF4 is easy to transport and delivers surprising low- and mid-range torque for quick acceleration.

Recommended Transom Height (inches) S: 15
Starting System Manual
Weight LBS S: 55
Engine Type OHV 2-Valve
Fuel Delivery System Carburetor
No. Of Cylinders 1
Piston Displacement inches (cc) 8.4 (138)
Bore X Stroke Inches (mm) 2.44 x 1.81 (62 x 46)
Maximum Output HP 4
Operating Range (RPM) 4000 – 5000
Steering Tiller
Choke Manual
Oil Pan Capacity quarts (liter) .74 (.7)
Ignition System Digital CDI
Alternator 12V 6A
Trim Position 5 Tilt Pin Positions
Gear Ratio 1.92:1
Standard Propeller 3 x 7.5 x 6.5
Propeller Selection 6 – 7
  • Over-Rev. Limiter
  • Digital CDI
  • Fresh Water Flushing System
  • Shallow Water Drive
  • Suzuki Anti-Corrosion System

Advantages

Model Name: DF4 Mercury 4 Yamaha 4
Manufacturer: Suzuki Mercury Yamaha
Horsepower: 4 4 4
Shaft Length (Inches): S (15), L (20) S (15), L (20) S (15), L (20)
Weight (Lbs): S (55), L (57) S (55) S (48), L (50)
Cylinders: 1 1, Push Rod 1, SOHC
Valves Per Cylinder: 2 2 2
Valve Train Drive: N/A Push Rod Cam Unknown
Displacement: 8.4 cu. in. (138 cc) 7.5 cu. in. (123 cc) 6.7 cu. in. (112 cc)
Bore and Stroke (Inches/mm): 2.44 x 1.81 in. (62 x 46 mm) 2.32 x 1.77 in. (59 x 45 mm) 2.32 x 1.61 in. (59 x 41 mm)
Operating Range (RPM): 4000-5000 4500 – 5500 4000 – 5000
Induction System: 1 carb 1 carb 1 carb
Starting System: Manual start w/ manual choke Manual Manual
Lubrication: Wet sump Wet sump Wet sump
Oil Tank Capacity: 0.74 qt. (0.7 lit.) Unknown 0.53 qt. (0.5 lit.)
Ignition: Digital CDI CDI CDI
Alternator: 12V 6A (optional) 4A optional Unknown
Trim Type: 5 positions 6 preset 5 preset
Gear Ratio: 1.92:1 2.15:1 2.08:1 / 13:27
CARB Emissions Rating: 3-Star Ultra-Low 3-Star Ultra Low 2-Star Very Low
Standard Propeller (Blades x Dia. x Pitches (Ins.)): 3 x 7 ½x 6½ 3 x 8 3/8 x 7 3 x 7½ x 8
Range of Avail. Optional Propeller Pitches: 6 – 7 Unknown 7 – 8
Steering: Tiller, 180° rotation Unknown 360°

DF4 Advantages

Over Honda

  • No Comparable 4-Stroke Model

Over Mercury

  • Larger displacement: 138cc (8.4 c.i.) vs. 123cc (7.5 c.i.) No replacement for displacement
  • Electronic ignition advance vs. moving stator plate
  • Stainless steel water pump vs. plastic
  • Single overhead cam vs. push rod

Over Yamaha

  • Larger displacement: 138cc (8.4 c.i.) vs. 112cc (6.7 c.i.) No replacement for displacement