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Suzuki MidSize DF40A Outboard Marine 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.
DF40A - DF50A - DF60A
Advantages | Model Name: | DF40A | Honda 40 | Mercury 40 | Yamaha 40 | | Manufacturer: | Suzuki | Honda | Mercury | Yamaha | | Horsepower: | 40 | 40 | (1) 40, (2) 40 EFI, (3) 40 Bigfoot EFI | 40 | | Shaft Length (Inches): | L (20) | L (20) | (1, 2) S15, L20, (3) L20, X25 | L 20 | | Weight (Lbs): | 229 | L (214) | (1) 204, (2) 216, (3) 260 | 216 | | Cylinders: | In-line 3 | In-Line 3 | (1, 2) In-Line 3 SOHC, (3) In-Line 4 | In-line 3 | | Valves Per Cylinder: | DOHC 4 Valves Per Cyl. | SOHC 2 Valves Per Cyl. | SOHC 2 Valves Per Cyl. | SOHC 2 Valves Per Cyl. | | Valve Train Drive: | Self adjusting oil bathed timing chain | Single overhead belt | Single overhead belt | Single overhead belt | | Displacement: | 57.4 cu. in. (941 cc) | 49.3 cu. in. (808 cc) | (1, 2) 45.6 cu. in. (747 cc), (3) 61 cu. in. (995 cc) | 45.6 cu. in. (747 cc.) | | Bore and Stroke (Inches/mm): | 2.85 x 2.99 in. (72.5 x 76 mm) | 2.80 x 2.80 in. (70 x 70 mm) | (1,2,3) 2.56 x 2.95 in. (65 x 75 mm) | 2.56 x 2.95 in. (65 x 75 mm) | | Operating Range (RPM): | 5000-6000 | 5000 - 6000 | 5500 - 6000 | 5000 - 6000 | | Induction System: | Sequential EFI with Lean Burn Control | Programmed EFI with Lean Burn Control | (1) 3 carbs, (2,3) EFI | EFI | | Starting System: | Suzuki Easy Start System | Electric | (1) Manual w/ Decompression, (2, 3) Electric | Electric or Manual | | Lubrication: | Wet sump | Wet sump | Wet sump | Wet sump | | Oil Tank Capacity: | 2.9 qt. (2.7 lit.) | 2.5 qt. (2.4 lit.) | 2.3 qt. (2.2 lit.) | 2.1 qt. (2.0 lit.) | | Ignition: | Direct Ignition | CDI* | (1) CDI, (2, 3) Digital Inductive | CDI Micro Computer | | Alternator: | 12V 19A | 22 A | (1) 6 A, (2,3) 18 A | 16 A | | Trim Type: | Power Trim and Tilt | Power Tilt | Power Trim and Tilt, Gas Assist | Power Trim and Tilt | | Gear Ratio: | 2.27:1 | 2.08:1 | (1, 2) 2.00:1, (3) 2.33:1 | 2.00:1/13:26 | | CARB Emissions Rating: | 3-Star Ultra-Low | 3-Star Ultra-Low | 3-Star Ultra-Low | 3-Star Ultra-Low | | Standard Propeller (Blades x Dia. x Pitches (Ins.)): | Optional - See Dealer | N/A | N/A | N/A | | Range of Avail. Optional Propeller Pitches: | 9 - 17 | Unknown | 8 - 19 | Unknown | | Steering: | Remote (Tiller Kit optional) | Unknown | Unknown | Unknown |
DF40A AdvantagesOver Honda - Larger Displacement 941cc (57.4 c.i.) vs. 808cc (49.2 c.i.) No replacement for displacement
- Zero Maintenance Self Adjusting Timing Chain vs. Inspect and Replace Timing Belt
- 2.27:1 vs. 2.00:1 Lower gear ratio to swing a larger prop for improved acceleration
- Suzuki Easy Start System for customer convenience
Over Mercury - Suzuki Lean Burn Control System - Improved fuel economy
- Zero Maintenance Self Adjusting Timing Chain vs. Inspect and Replace Timing Belt
- DOHC 4 valves per cylinder vs. SOHC 2 valves per cylinder
- Larger Displacement 941cc (57.4 c.i.) vs. 747cc (45.6 c.i.) No replacement for displacement
- 2.27:1 vs. 2.00:1 Lower gear ratio to swing a larger prop for improved acceleration
- Direct Ignition vs. standard coil for reduce electrical interference
- Suzuki Easy Start System for customer convenience
Over Yamaha - Suzuki Lean Burn Control System - Improved fuel economy
- Zero Maintenance Self Adjusting Timing Chain vs. Inspect and Replace Timing Belt
- DOHC 4 valves per cylinder vs. SOHC 2 valves per cylinder
- Larger Displacement 941cc (57.4 c.i.) vs. 747cc (45.6 c.i.) No replacement for displacement
- 2.27:1 vs. 2.00:1 Lower gear ratio to swing a larger prop for improved acceleration
- Direct Ignition vs. standard coil for reduce electrical interference
- Suzuki Easy Start System for customer convenience
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Features
- 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
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