Yamaha LF350XSA 350HP – DEC 25″ Shaft Counter Rotationin Gray

Yamaha LF350XSA 350HP Digital Counter

The Yamaha LF350XSA runs a 4.3L DOHC 24-valve V6 in Classic Gray at 529 lbs dry — a strong power-to-weight ratio for a high-performance multi-engine offshore hull. The 25-inch shaft and counter-rotation gearcase are built into Mulmarine’s outboard engine technology lineup for boats that need neutralized torque and steering precision on heavy oceanic transits.

Peak output holds through the 5000-6000 RPM band, using Integrated Digital Electric Steering (DES) and Helm Master EX control systems. The 1.75:1 gear ratio converts that V6’s energy into thrust that gets a loaded hull planing quickly. US offshore captains lean on this Japan-engineered platform for its reliability and digital integration in demanding sea conditions.

Technical Specifications of Yamaha LF350XSA

• The 4.3L V6 DOHC architecture delivers 350 horsepower with strong volumetric efficiency.
• The Gray 240 kg build runs a 25-inch shaft sized for specialized offshore hulls.
• The counter-rotation (left-hand) gearcase balances steering torque in twin-engine installs.
• Integrated Digital Electric Steering (DES) delivers effortless handling and precise control at any speed.
• Digital Electronic Control (DEC) with Helm Master EX compatibility keeps helm management smooth.
• The 50-70 Amp alternator output keeps navigation displays and digital sonar powered.
• Coverage comes from a limited 3-year factory warranty and Japanese build standards.

4.3L High-Output V6 Performance

The LF350XSA runs a 4.3-liter block for strong torque output in the V6 class, delivering aggressive hole-shot acceleration and steady mid-range cruising on heavy fiberglass center consoles. Captains get real power reserves navigating heavy offshore inlets or holding speed against strong currents.

Integrated DES Technology

This 350HP outboard runs Integrated Digital Electric Steering (DES) for a smooth, responsive feel at the helm without external hydraulic lines. The digital system keeps transom rigging clean while giving the operator adjustable steering friction. Offshore anglers get to run long tournament days without fatigue or mechanical lag.

Digital Command DEC Interface

This 350HP outboard runs Digital Electronic Control (DEC) for smooth, cable-free throttle and shifting at the helm, compatible with modern offshore rigging for advanced positioning and multi-engine synchronization.

Counter-Rotation Torque Balance

The LF350XSA’s left-hand rotation gearcase neutralizes propeller torque when paired with a standard F350 motor, allowing effortless steering and steady tracking in following seas or sharp maneuvers.

Precision EFI Induction

This 350HP four-stroke runs a precision EFI system that optimizes fuel atomization across varying maritime climates, keeping throttle response smooth and starting power consistent even in extreme temperatures.

Routine Maintenance Care

This digital V6 runs high-quality sacrificial anodes to keep galvanic corrosion in check in saltwater coastal environments. Regular attention to the power trim and tilt system, along with the cooling passages, keeps the engine running smoothly. Pro Tip: flush the internal cooling passages with fresh water after every launch to protect against internal salt accumulation.