Suzuki DF350A 350HP – Dual Prop 30-Inch Shaft

Suzuki DF350A 350HP Dual Prop FourStroke

The Suzuki DF350A is a specialized ultra-long shaft V6 outboard engineered for high-transom offshore vessels in the North American maritime sector. Built on a robust 4390cc DOHC 24-valve powerhead and weighing 747 lbs, this unit provides contra-rotating propeller authority for heavy hull stability. This 30-inch shaft model is the definitive match for offshore center consoles requiring strong low-end torque and rugged mechanical integrity during sustained deep-water transits in choppy environments where power is the primary requirement.

Peak operational performance for this Suzuki 350HP occurs between 5400 and 6300 RPM, utilizing a high 12.0:1 compression ratio for maximum thermal efficiency. The specialized 2.29:1 gear ratio and dual-propeller system 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 the corrosion-resistant block maintains peak structural integrity while resisting the abrasive effects of the saltwater environment during long-range coastal navigation.

Technical Specifications of Suzuki DF350A

• The 4390cc V6 55-degree DOHC 24-valve powerhead delivers energy release and high-torque performance for heavy loads.
• Contra-rotating dual propellers provide increased surface area for maximum energy release and grip in deep 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.
• The 30-inch ultra-long shaft helps support maximum propeller depth to prevent cavitation in rolling offshore sea conditions.
• A robust 12V 54A alternator delivers essential charging power to support high-draw navigation systems and safety electronics.

Dual Propeller Authority

The flagship FourStroke 350HP technology leverages a contra-rotating propeller system to eliminate torque steer and maximize thrust. 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 while utilizing high-performance outboard technology to its fullest during long shifts in deep water.

Lean Burn Dual Injector EFI

The Suzuki Lean Burn system with Dual Injector technology monitors atmospheric variables to provide a precise cooling mist of fuel to the combustion chamber. 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.

Ultra-Long Shaft Reach

The hole-shot performance is stabilized by a 30-inch hydrodynamic shaft designed for transoms on multi-engine offshore vessels. Its profile helps support consistent propeller grip in deep swells, providing the captain with boat control during complex harbor maneuvers and high-speed offshore coastal transits where propeller ventilation must be avoided entirely during professional navigation in choppy waters.

High Output Alternator

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 maritime 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 in all conditions.

Vessel Application

This 350HP unit application is specifically for offshore center consoles and heavy 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 sustained maritime authority across the North American coastlines.

Maintenance & Longevity

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