Yamaha LXF450ESA 450HP V8 XTO Counter-Rotation 35″

Description

The Yamaha LXF450ESA pairs 450HP with a 35-inch ultra-long shaft, built with counter-rotation gearing for multi-engine offshore boats. The 5.6-liter V8 platform holds up under extreme high-seas operation, spreading its 5559cc displacement over a 1010 lbs dry weight for structural rigidity. Built for towering deep-V sterns, the 35-inch shaft ensures full propeller immersion and continuous bite on large catamarans and express cruisers in open ocean water.

Sustaining high-speed cruising across long tournament distances is straightforward running this powerhead within its 5000-6000 RPM range. The 1.79:1 gear ratio translates combustion pressure into a broad torque curve that lifts wide hulls onto plane quickly. This is a Japan-engineered platform, built for mechanical consistency running far beyond standard coastal ranges.

Technical Specifications of Yamaha LXF450ESA

• High-pressure direct fuel injection pushes gasoline at 2900 PSI for clean, complete combustion.
• A 102-Amp gross alternator handles the electrical load of modern multi-display helms.
• Integrated electric power steering removes traditional hydraulic lines for cleaner rigging and responsive tracking.
• TotalTilt makes trimming simple with an automatic tilt limiter built in for shallow water.
• A 7.8-liter oil reservoir keeps components lubricated through long wide-open-throttle runs.
• The counter-rotation lower unit reverses propeller spin for balanced tracking on dual or quad-engine setups.

32-Valve V8 Cylinder Design

The sleeveless 32-valve DOHC V8 is engineered to shave weight from the powerhead while managing heat transfer effectively under severe offshore conditions — a meaningful factor given the load this block carries across a full day offshore.

Direct Fuel Injection System

Fuel is pushed straight into each cylinder at pressures topping 2900 PSI for complete combustion. This delivery system produces crisp throttle recovery and reliable starting when navigating treacherous inlets or heavy head seas.

Hydrodynamic Lower Gear Housing

Oversized drive gears housed inside a hydrodynamic lower unit keep drag profiles down during high-speed cruising. That build dampens gear-shift vibration while maximizing directional tracking on deep-transom multi-engine hulls.

Integrated Electric Steering System

Steer-by-wire deletes external hydraulic lines and valves for uncompromised helm response, coordinating with the 102-Amp gross alternator to keep critical open-water electronics powered.

Target Vessel Hull Integration

Large offshore center consoles, express cruisers, and catamarans from 30 to over 45 feet are the right match for this outboard. The 35-inch ultra-long shaft prevents propeller ventilation climbing massive rollers in rough open-ocean swells.

Rapid Fluid Servicing Access

A multi-piece cowling detaches smoothly for quick dipstick checks, and drainage pathways isolate waste fluids for clean oil changes right at the dock. Pro Tip from the Shop: connect a freshwater wash hose directly to the upper flushing port after every trip to blast salt crystals out of the cooling jacket without starting the engine.