Suzuki DF350A 350HP – Dual Prop 25-Inch Shaft

Suzuki DF350A 350HP Dual Prop FourStroke

The Suzuki DF350A 350HP Dual Prop is a flagship V6 outboard featuring a 4.4L architecture and contra-rotating propellers for the North American offshore market. Built on a robust 4390cc DOHC 24-valve powerhead and weighing 727 lbs, this unit delivers unparalleled hydrodynamic authority through a high 12.0:1 compression ratio. This 25-inch shaft model is perfectly matched for heavy offshore fiberglass vessels requiring low-end torque and rugged mechanical integrity for sustained deep-water transits in unpredictable saltwater environments.

Maximum operational performance for the Suzuki 350HP is maintained between 5400 and 6300 RPM, requiring 91 Octane premium unleaded fuel for peak thermal efficiency. The specialized 2.29:1 gear ratio and dual propellers facilitate the mechanical translation of the torque curve into rapid hole-shot capability and superior directional stability. This engine exemplifies Japanese engineering excellence for offshore salt-water use, ensuring that the corrosion-resistant block withstands intense maritime pressure while providing energy release during professional navigation.

Technical Specifications of Suzuki DF350A

• The 4390cc V6 55-degree DOHC 24-valve powerhead delivers displacement and high-torque performance for heavy loads.
• Contra-rotating dual propellers provide increased surface area for maximum energy release and grip in rolling ocean swells.
• Suzuki Lean Burn Dual Injector EFI helps support reliable zero-choke starting and thermal efficiency in all maritime conditions.
• Suzuki Precision Control provides hyper-responsive drive-by-wire throttle and shift for flawless digital authority at the helm.
• A robust 12V 54A alternator delivers essential charging power to support modern high-draw navigation systems and safety electronics.
• The dual water intake system helps support consistent cooling flow to the 4.4L block even during high-speed performance runs in warm waters.

Dual Injector V6 Tech

The flagship FourStroke 350HP engine technology utilizes a dual injector system to deliver a precise cooling mist of fuel to the combustion chamber. This sophisticated architecture helps support strong acceleration across the entire torque curve, providing the mechanical integrity needed for tournament-level fishing and high-speed coastal transit in marine offshore environments while utilizing high-performance outboard motor technology to its fullest.

Precision Fuel Induction

The Suzuki Lean Burn system monitors atmospheric variables to provide the appropriate fuel induction ratio for peak performance. This technology is designed to support instant starting and prevents engine bogging, completely eliminating carburetor-related maintenance while providing rapid acceleration and clean combustion for professional long-range trips in performance-driven coastal saltwater maritime environments.

Hydrodynamic Shaft Performance

This unit’s hole-shot performance is stabilized by a 25-inch hydrodynamic shaft designed for versatile high-transom heights. Its profile helps support consistent propeller grip in deep swells, while contra-rotating technology eliminates torque steer, providing the captain with boat control during complex harbor maneuvers and high-speed offshore coastal transits on various performance boat hulls.

Digital Charging Authority

Equipped with a robust 54 Amp alternator, the engine generates significant current to power modern high-definition displays and radar units. This electrical authority helps support your battery bank remains healthy during extended excursions, providing the reliability required for multi-day tournament fishing trips and supporting the electronics suite for navigation and communication safety.

Suzuki 350HP Warranty

Every Suzuki 350HP is backed by a comprehensive 3-Year Limited Warranty for American boat owners. This factory-level protection covers structural and mechanical defects, ensuring access to genuine replacement parts and certified technicians through a vast nationwide dealer network, reflecting a deep commitment to long-term maritime reliability and high-speed performance.

Vessel Application

This 350HP unit application is specifically for heavy offshore center consoles and large fiberglass hulls requiring energy release. Its dual-propeller grip and 12.0:1 high-compression torque make it perfectly suited for coastal tournament fishing or as a dependable primary power source for recreational vessels requiring strong and refined maritime authority.

Maintenance & Longevity

Maintaining the 8.5-quart wet sump system is vital for preserving the 4.4L engine’s tight mechanical tolerances. Freshwater flushing after every excursion prevents internal salt deposits and maintains the cooling system health across various coastal climates.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.