Suzuki Marine - Product Lines - Outboard Motors - Products - DF40 - 2012

DF40A

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.

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

DF40A

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Specs

Specs:	First Edition
Body Color	Pearl Nebular Black or Cool White
Recommended Transom Height (inches)	L: 20
Starting System	Electric
Weight LBS	L: 229
Engine Type	DOHC 12-Valve
Fuel Delivery System	Multi Point Sequential Electronic Fuel Injection
No. 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)
Choke	N/A
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

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 Advantages

Over 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

DF40A Gallery

DF40A

Rider Safety

Genuine Suzuki Accessories

Finance

Special Offers

Advantages

DF40A Advantages

Over Honda

Over Mercury

Over Yamaha

Boat Tests

V6

IN-LINE 4

MID-RANGE

PORTABLE

ACCESSORIES

DEALERS

BOAT BUILDERS

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