Suzuki DF40A – Fuel-Efficient 40HP 3-Cylinder Outboard Engine

Code:

DF40A TS

Suzuki DF40A – Fuel-Efficient 40HP Outboard

Features

Engine hp:

40 hp
Engine type:

Inline 3 cylinders
Displacement:

941 cc (L)
Max. RPM:

5000 - 6000 RPM RPM
Alternator Amp / Watt:

18A / 226W
Fuel recommendation:

Unleaded, minimum 91 RON
Reduction gear ratio:

2.27:1
Ignition type:

CDI Microcomputer
Fuel system:

EFI
Cooling system:

Water cooling + thermostat
Gears:

F-N-R
Exhaust system:

Through the propeller
Oil tank capacity:

2.7 L.
Propeller:

Yes
Fuel tank:

25 L.

The Suzuki DF40A is a 40 HP four-stroke outboard designed for superior fuel efficiency and smooth power delivery in a compact package. Its 941 cc inline-3 DOHC engine (the only DOHC in the 40HP class) provides nimble acceleration and reliable performance, while Suzuki’s Lean Burn technology ensures exceptionally low fuel consumption – up to 23% better than previous models. Light, compact, and featuring maintenance-free chain-driven cams, the DF40A is an ideal choice for small boats.

DOHC 12-Valve Engine: A 941cc inline-3 with the same advanced 4-valve-per-cylinder head found in larger models – a unique offering in the 40HP class that delivers higher power and efficiency than competing designs.
Lean Burn Control: Smart fuel management adjusts the air-fuel mixture on the fly, achieving roughly 23% lower fuel burn at mid-range cruising compared to older 40HP engines, saving gas and money.
Ultra-Lightweight: Weighing only ~102 kg (for the short shaft model), the DF40A is among the lightest 40HP outboards, making it easy to mount on small RIBs, inflatables, and aluminum boats without excessive stern weight.
19A Alternator: A high-output alternator (19A) provides around 11.5A even at only 1000 RPM, keeping fish-finders, lights, and other marine electronics powered and batteries charged during slow trolling or idling.
Self-Adjusting Timing Chain: The valve train is driven by a self-tensioning timing chain that never needs manual adjustment – offering greater reliability than belt systems, especially valuable for long-term, heavy-duty use.
Easy Starts & Trolling Option: The EFI system and Suzuki’s Easy Start ensure quick, hassle-free ignition with no need to hold the key. An optional Suzuki Troll Mode system can be added for fine-tuned low-speed control (great for anglers who troll), adjusting engine speed in 50 RPM increments.

Model:

Price: €7,408⁶² 14490⁰⁰лв.

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The Suzuki DF40A brings technologies from higher-powered engines to ensure maximum performance and economy in the 40HP range. This makes it a favorite among small boat owners who don’t want to compromise on power or efficiency. Recommended uses and benefits include:

Ideal for Small Boats: The DF40A is particularly well-suited for inflatable RIB boats around 4m in length, small fiberglass or aluminum fishing skiffs, and even as a primary engine for sailboats that require an auxiliary motor. Its light weight and compact dimensions mean easy installation and improved balance on smaller vessels.
Outstanding Economy for Long Runs: Thanks to the Lean Burn system, this 40HP engine dramatically cuts fuel use at typical cruising speeds. In practice, boaters can spend more time exploring coastlines or fishing spots without worrying about running low on fuel. This is a huge plus on lakes and bays where refueling options are limited or when you just want to maximize your time on the water.
Quick Acceleration & Agility: The DOHC design and the robust gear reduction in the lower unit (2.27:1 ratio) give the DF40A excellent “hole shot” and planing performance. Even with a heavier load, the engine remains snappy. This inspires confidence when pulling away from docks, maneuvering in rivers, or accelerating when needed, as the boat responds swiftly to throttle input.
Low Noise & Vibration: The 3-cylinder engine runs smoothly, and the optimized lower unit shape (a hydrodynamic gear case) reduces drag and underwater noise. The DF40A meets stringent emission standards and carries a three-star CARB rating for ultra-low emissions – it’s both eco-friendly and quiet, so it won’t spook fish or spoil the tranquility of a cruise.
Minimal Maintenance – Maximum Uptime: Suzuki designed this engine to eliminate many potential failure points: there’s no timing belt to snap, and no frequent valve adjustments needed thanks to the self-adjusting chain. Flushing the cooling system is made easy by dual flush ports (one on the side and one on the front), so even when mounted on the boat, you can conveniently rinse out salt and debris with fresh water after each use.
Optional Troll Mode for Anglers: For trolling fishing enthusiasts, the DF40A can be fitted with the Suzuki Troll Mode system. This allows precise control of engine RPM at low speeds so the boat can creep along steadily without constant throttle adjustments. The result is better lure presentation and more fish strikes, all without tiring out the captain from manual throttle control.