Suzuki DF40A / DF50A: manual and spare parts

Specifications for Suzuki DF40A / DF50A
Power	40–50 hp
Cylinders	3
Displacement	0.94 l
Fuel	Petrol
Type	Outboard

Autumn and spring plan for Suzuki DF40A / DF50A

Here's what to do when hauling out and launching. Always follow the instruction book for your engine.

Autumn

Change the engine oilOil filter 16510-87J00-000 · 2.7 l Suzuki Marine 4-Cycle Engine Oil SAE 10W-40 or 10W-30 · First time after 20 hours or 1 month. · every 100 hours or annuallyBuy: Search at Watski
Change the oil filterOil filter 16510-87J00-000 · 2.7 l Suzuki Marine 4-Cycle Engine Oil SAE 10W-40 or 10W-30 · First time after 20 hours or 1 month. To be carried out by a Suzuki dealer. · every 200 hours or annuallyBuy: Search at Watski
Change gear oilFirst time after 20 hours or 1 month. · every 100 hours or annually
Lubricate the grease pointsevery 100 hours or annually
Check the anodesAnode 55321-87J00-000 · every 100 hours or annuallyBuy: Search at Watski
Add fuel stabiliserFuel filter 15410-88L00-000 · The engine has fuel injection, so there is no carburettor to run dry. Follow the manufacturer's instructions.Buy: Marinshopen
Flush the engine with fresh water
Lubricate according to the lubrication schedule

Spring

Check the thermostatTo be carried out by a Suzuki dealer. · every 100 hours or annually
Replace the impellerWater pump kit with impeller 17400-88L00-000 · To be carried out by a Suzuki dealer. · every 300 hours or every 36 monthsBuy: Marinshopen
Check the propeller and anodesAnode 55321-87J00-000Buy: Search at Watski
Check the gearcase oilMilky oil means there is water in the gear housing.
Check that cooling water comes out of the tell-tale hole

Add to calendar Tick off in the service bookTwo reminders a year: in April and in October.

Service data

Engine oil

Specification: Suzuki Marine 4-Cycle Engine Oil SAE 10W-40 or 10W-30
Volume: 2.7 l

Suzuki Marine: Owner's Manual DF40A/DF50A/DF60A, Specifications (PDF) (external link)

Gear oil

Specification: Hypoid oil SAE 90 API GL-5
Note: 0.61 l for DF40A/50A/60A, 1.05 l for DF40ASV/50AV/60AV.

Suzuki Marine: Owner's Manual DF40A/DF50A/DF60A, Specifications (PDF) (external link)

Spark plugs

Spark plugs: NGK DCPR6E
Spark plug gap: 0.8 to 0.9 mm

Suzuki Marine: Owner's Manual DF40A/DF50A/DF60A, Specifications (PDF) (external link)

Fuel

Fuel system: Fuel injection (EFI)
Fuel: Unleaded petrol, no oil mixing, four-stroke
Minimum octane rating: 91 RON
Maximum ethanol: 10 %

Suzuki Marine: Owner's Manual DF40A/DF50A/DF60A, Specifications (PDF) (external link)

Good to know

Same base engine

The same base engine is also found in:

Suzuki DF60A / DF60AV

DF40A, DF50A and DF60A share the same base engine

Suzuki's shared owner's manual lists three cylinders, 941 cm³ displacement and 72.5 x 76 mm bore and stroke for the DF40A, DF50A and DF60A.

Differences according to the manufacturer

Rated power 29.4 kW (40 hp), 36.8 kW (50 hp) and 44.1 kW (60 hp)

Official power upgrade: No official upgrade found

Global Suzuki DF50A/DF40A (external link)
Suzuki owner's manual DF40A/50A/60A (external link) · page 61 (PDF)

Law, safety and insurance

The boat must not have a more powerful engine than the maximum power specified by the boat manufacturer in the owner's manual or CE documentation. An overpowered engine can impair steering and buoyancy or damage the transom. Mercury operator's manual, boat power limit (external link)

Under the Recreational Craft Directive 2013/53/EU, increasing the rated power by more than 15 percent counts as a major engine modification, which requires a new conformity assessment before the engine is used. Directive 2013/53/EU, Articles 3 and 19 (external link)

If's boat insurance terms state that the boat must not have a more powerful engine than it is approved for, otherwise compensation may be reduced or denied. If boat insurance, terms section 3.3.4 (external link)

The warranty may be affected: Volvo Penta excludes faults caused by modified software or electronics, and Mercury warns that the warranty may be voided by improper use. Volvo Penta warranty terms, page 6 (external link) · Mercury operator's manual, warranty (external link)

Marinpedia does not publish instructions for unlocking power, as this can make the boat dangerous, violate CE regulations and affect insurance and warranty.

Troubleshooting

Starting problems

Runs rough, stalls or loses power

Smoke and exhaust

Oil, water and fuel

Electrics, alarms and fault codes

Drive, gearbox and trim

Outboard

Manuals

Official
Owner's Manual (external link)
FLERA · PDF · 2021

Spare parts

Spare parts for Suzuki DF40A / DF50A
Part	Part number	Note	Source
Service kit	17400-88813-0001 pcs	DF40A, DF50A, DF60A from 2010	Nordwall Marin: Suzuki service kit DF40A/DF50A/DF60A 2010- (external link)
Water pump kit with impeller	17400-88L00-0001 pcsBuy (1)		Nordwall Marin: Suzuki service kit DF40A/DF50A/DF60A 2010- (external link)
Oil filter	16510-87J00-0001 pcs		Nordwall Marin: Suzuki service kit DF40A/DF50A/DF60A 2010- (external link)
Fuel filter	15410-88L00-0001 pcsBuy (1)		Nordwall Marin: Suzuki service kit DF40A/DF50A/DF60A 2010- (external link)
Spark plug NGK DCPR6E	09482-00446-0003 pcsAlternatives: 1		Nordwall Marin: Suzuki service kit DF40A/DF50A/DF60A 2010- (external link)
Anode	55321-87J00-0003 pcs		Nordwall Marin: Suzuki service kit DF40A/DF50A/DF60A 2010- (external link)

Parts shared with

Suzuki DF60A / DF60AV 6 shared part numbers

Listings for Suzuki DF40A / DF50A

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Owners' experiences

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Related models

Suzuki DF2.5

Outboard

0.068 l · 2.5 hp · Petrol

Suzuki DF4A / DF5A / DF6A

Outboard

0.14 l (DF4A/DF6A) · 4–6 hp · Petrol

Suzuki DF8A / DF9.9A

Outboard

8–9.9 hp · Petrol

Suzuki DF9.9B / DF15A / DF20A

Outboard

0.33 l · 9.9–20 hp · Petrol

Service guides

Replacing the impeller →Winterize a boat engine →

Frequently asked questions about Suzuki DF40A / DF50A

Where can I find the owner's manual for Suzuki DF40A / DF50A?

Links to owner's manuals and workshop manuals are available under Manuals.

How many cylinders does Suzuki DF40A / DF50A have?

Suzuki DF40A / DF50A has 3 cylinders.

What fuel does the Suzuki DF40A / DF50A use?

Suzuki DF40A / DF50A runs on petrol.

Which impeller fits the Suzuki DF40A / DF50A?

Part number 17400-88L00-000 is listed for this model.

Suzuki DF40A / DF50A

Engine data

Autumn and spring plan for Suzuki DF40A / DF50A

Autumn

Spring

Email me the plan

Service data

Engine oil

Gear oil

Spark plugs

Fuel

Good to know

Troubleshooting

Starting problems

Runs rough, stalls or loses power

Smoke and exhaust

Oil, water and fuel

Electrics, alarms and fault codes

Drive, gearbox and trim

Outboard

Manuals

Spare parts

Parts shared with

Listings for Suzuki DF40A / DF50A

Owners' experiences

Related models

Suzuki DF2.5

Suzuki DF4A / DF5A / DF6A

Suzuki DF8A / DF9.9A

Suzuki DF9.9B / DF15A / DF20A

Service guides

Frequently asked questions about Suzuki DF40A / DF50A

Sources