Suzuki DF325A – 325 HP Dual-Prop High-Thrust Outboard

The DF325A was engineered to deliver near-flagship power with added versatility. It uses the same 4.4-liter V6 “big block” as the 350A, making it one of the largest displacement outboards in its class, but is specifically tuned to run on 91 RON (regular) fuel – a game-changer for boaters in areas where only standard gasoline is readily available or for those looking to save on fuel costs without sacrificing output. At 325 HP, this model provides a hearty dose of thrust and speed, more than enough for large center consoles, offshore fishing boats, and heavy-duty work vessels. What truly sets the DF325A apart is its dual contra-rotating propeller system. Suzuki’s dual prop technology (two propellers spinning in opposite directions on the same engine) dramatically increases the engine’s grip on the water. The result is a boost in low- and mid-range acceleration (especially helpful for pushing heavier boats onto plane), improved straight-line stability, and enhanced maneuverability at low speeds. The twin props also evenly distribute the engine’s torque, which cancels out lateral propeller forces – meaning virtually zero steering torque pull on the helm and more precise handling. Essentially, the DF325A offers the ability to move big boats with authority and confidence, even in challenging conditions. And despite its might, the engine’s design emphasis on efficiency and balance keeps the operation smooth and the fuel usage surprisingly moderate for its size.

On the technical front, the DF325A carries over many of Suzuki’s flagship innovations to ensure high performance is met with high efficiency and reliability. It features dual fuel injectors per cylinder, which improves atomization for a more complete burn – this is one way Suzuki achieves maximum power and fuel economy even on regular fuel with this engine. The DF325A also leverages a moderately high compression ratio (adjusted slightly lower than the DF350A’s extreme 12.0:1, to accommodate regular fuel) which, combined with the dual injectors and a special air intake system, yields excellent combustion efficiency and output. A dual air intake with a double louver system is built into the cowl, removing moisture from the incoming air to ensure only dry, cool air enters the engine – this not only boosts power but also protects internal components from saltwater intrusion. Like the DF350A, this model comes standard with Suzuki Precision Control for drive-by-wire throttle and shift, giving you effortlessly smooth command over the engine’s power. The gear case of the DF325A is engineered to handle its high torque output, with robust gears and bearings, as well as Suzuki’s two-way water inlet for reliable cooling flow. The Lean Burn system continuously fine-tunes the fuel mixture for optimal economy at cruising speeds, making the DF325A remarkably efficient for a 300+ HP engine. Maintenance and durability are also top priorities: a self-adjusting timing chain, an enhanced engine mount system to reduce vibration, and full Suzuki anti-corrosion treatments ensure that this outboard will run reliably season after season, even under heavy use. With the DF325A, Suzuki managed to perfectly balance awesome power and thrust with outstanding fuel-efficiency and trusted reliability, all within a relatively lightweight and easy-to-manage design for its class. It’s an ideal choice for those who need near-350HP performance but prefer (or require) regular fuel, giving boaters a new level of flexibility and value in the high-horsepower outboard market.