A New Design for Suzuki's V6 AP Engines

A New Design for Suzuki’s V6 AP Engines

Suzuki Unveils Redesigned DF300AP and DF250AP V6 Outboard Motors for 2025

Suzuki Marine has announced a stylistic evolution for its DF300AP and DF250AP V6 outboard motors, set to debut in 2025. The engine cowlings have been redesigned to create a more assertive and angular aesthetic. These new models align with the design language previously seen in the DF300/250 Stealth Line.

Key Features and Technologies

  • Powerful Performance: The DF300AP boasts a 4.0-liter V6 engine, delivering smooth acceleration and impressive torque.
  • Selective Rotation: This model offers versatility with its ability to operate in both standard and counter-rotation modes, making it suitable for twin-engine configurations.
  • Variable Valve Timing (VVT): Equipped with VVT and multi-stage induction, the DF300AP ensures consistent power across the RPM range.
  • Hydrodynamic Design: The engine’s design minimizes drag for increased speed and improved fuel efficiency.

Innovative Technology

The Suzuki AP range features selective rotation technology, allowing the same engine to be mounted on either the left or right side in twin or triple motor setups. This is achieved through a simple connector activation, making motor installation easier.

“The reduction in the diversity of spare parts not only facilitates maintenance but also reduces its cost.”

Suzuki engineers have reinforced the lower part of the engine and the gears, creating a gearcase capable of rotating in either direction. The electronic control system (SPC) and Lean Burn control, combined with the V6 block, provide users with remarkable performance and ease of use.

The DF250AP and DF300AP models feature an offset drive shaft relative to the crankshaft, allowing for a primary reduction between the crankshaft and the drive shaft, and a secondary reduction between the drive shaft and the gearbox inside the gearcase. This mechanism allows for the mounting of large-diameter propellers to maximize the engine’s propulsive efficiency. It also shifts the center of gravity forward, giving the engine better balance, less vibration, and greater stability during operation.

Optimized Fuel Consumption

The advanced sequential multi-point electronic fuel injection system gathers operational information from a series of sensors located at key points in the engine, processes it, and calculates the optimal amount of fuel and air needed for starting. Boaters can benefit from easy starts, maximum efficiency, and optimized fuel consumption. These engines feature a unique cooling system that offers enhanced performance. Before combustion, the fuel is cooled to become a more viscous fluid, resulting in increased power and greater fuel economy.

Summary

The standardization of spare parts is a plus for the user, reducing both maintenance costs and waiting times when replacing components. Importantly, to obtain the counter-rotating version, simply replace a connector in the engine wiring and use a suitable propeller.

With this design evolution and a series of technical innovations that enhance performance, ergonomics, and ease of use, Suzuki confirms its expertise in the high-end V6 outboard segment. Between controlled power, optimized consumption, and flexible installation, the new DF250AP and DF300AP are positioned as reference choices for demanding boaters looking for reliability, style, and efficiency.



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