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Outboard motor engine DF25A STEALTH
gasolineprofessionalfor boat

Outboard motor engine - DF25A STEALTH - Suzuki Marine Europe - gasoline / professional / for boat

Outboard motor engine - DF25A STEALTH - Suzuki Marine Europe - gasoline / professional / for boat - image - 2

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Outboard motor engine - DF25A STEALTH - Suzuki Marine Europe - gasoline / professional / for boat - image - 7

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Characteristics

Type

outboard motor

Power source

gasoline

Market

for boat, professional

Technology

direct fuel injection

Ignition

electric start, manual start

Other characteristics

4-stroke

Power

18.4 kW
(25 hp)

Displacement

489 cm³
(17 US fl oz)

Number of cylinders

3 unit

Engine speed

Min.: 5,000 rpm
(31,416 rad.min-1)

Max.: 6,000 rpm
(37,699 rad.min-1)

Bore

71.1 mm
(2.8 in)

Stroke

68.1 mm
(2.7 in)

Weight

Min.: 62 kg
(137 lb)

Max.: 74 kg
(163 lb)

Description

About
The DF25A STEALTH is a portable 25 HP four-stroke outboard that combines ultra-lightweight construction with advanced fuel management. Featuring Lean Burn control and Suzuki Battery-Less Electronic Fuel Injection, it delivers quicker starts, responsive acceleration and improved fuel efficiency—ideal for small boats and professional applications.

Features

Lighter and stronger. Among the lightest in the 18.4 kW (25 PS) four-stroke class while incorporating advanced engine technology.
Efficient Lean Burn. The Lean Burn system adapts the fuel-air mixture by monitoring engine performance and operating conditions to reduce fuel consumption and emissions.
Off-center crankshaft. The crankshaft is positioned slightly off-center to reduce lateral pressure on the cylinder wall, enabling smoother piston movement and higher operating efficiency.
Battery-Less EFI. Electronic Fuel Injection provides faster starts, improved throttle response and smoother running without adding bulk or weight.
Easy starting options. Fuel injection plus a lightweight Easy Start recoil reduces pull effort; electric-start variants are available for added convenience.

Technical specifications

MODEL: DF25A STEALTH
Body Color: Matte Black
Recommended Transom Height (inches): S:15" L:20"
Starting System: Manual S / Electric S and L
Weight LBS: Manual S: 136.6 / Electric S: 143 - Electric, Tiller, Power Trim and Tilt L: 163
Engine Type: SOHC 4-Valve
Fuel Delivery System: Suzuki Battery-less Electronic Fuel Injection with Lean Burn Control
No. Of Cylinders: 3
Piston Displacement inches (cc): 29.8 (489)
Bore X Stroke Inches (mm): 2.80 x 2.68
Maximum Output HP: 25
Operating Range (RPM): 5000 - 6000
Steering: Tiller/Remote
Choke: N/A - Suzuki Electronic Fuel Injection
Oil Pan Capacity quarts (liter): 1.6 (1.5)
Ignition System: Digital CDI
System Output: Manual 12V 14A / Electric 12V 14A
Trim Position: 5 Tilt Pin Positions - Manual / Power Tilt and Trim
Gear Ratio: 2.09:1
Standard Propeller: 3 x 9.25 x 10
Propeller Selection: 7 - 11
Additional Information: Boat test data available (Boat Test data referenced on page).