Yamaha LXF450XSA2 450HP XTO Counter-Rotation DEC 25″

Description

The Yamaha LXF450XSA2 is a 450hp counter rotation outboard designed with a 25-inch shaft for multi-engine offshore boats. This 5.6-liter V8 platform produces immense structural density through its massive 5559 cc displacement while maintaining an optimized dry weight of 963 lbs to maximize pure marine performance. Engineered explicitly for mid-transom configurations, the 25-inch shaft length ensures ideal propeller depth and balanced tracking across heavy-duty fiberglass hulls navigating rough open ocean waters.

Running hard within its 5000 to 6000 RPM range is how this offshore engine sustains incredible cruising speeds across long tournament distances. The heavy-duty 1.79:1 gear ratio converts pure combustion forces into a flat torque curve, ensuring heavy boats pop onto plane without burying the stern under heavy loads. This Japanese-built masterpiece leverages advanced block harmonics to eliminate low-frequency hull vibrations during severe long-range deep-sea operations.

Technical Specifications of Yamaha LXF450XSA2

• High-pressure direct fuel injection atomizes gasoline at 2900 PSI to optimize thermal efficiency across all cylinders.
• A heavy-duty 102 gross amp alternator generates massive power to keep house battery banks fully topped off.
• The fully integrated electric steering mechanism replaces complex hydraulic lines with instant digital response at the steering wheel.
• The proprietary TotalTilt system simplifies trailing and shallow-water operation by tilting the massive lower unit completely out of harm.
• An extensive 7.8-liter oil sump ensures optimal thermal dissipation and continuous lubrication during hard wide-open throttle runs.
• The specialized counter-rotation gearcase balances out propeller torque to maintain tracking on multi-engine express cruisers.

V8 Plasma Fusion Block

Plasma fusion technology creates micro-textured cylinder walls in this sleeveless 32-valve double overhead camshaft V8 to maximize overall thermal efficiency. This extreme engineering process shaves critical pounds off the powerhead while drastically improving heat dissipation under severe offshore environments.

Direct Fuel Injection System

Direct fuel induction sprays gasoline straight into the combustion chambers under 2900 PSI of high pressure for cleaner combustion cycles. This meticulous delivery system guarantees immediate throttle response and flawless cold starts during changing early morning coastal marine conditions.

Counter Rotating Gearcase Profile

Oversized internal gears and a streamlined lower unit maximize hydrodynamic thrust while canceling out heavy steering pull on multi-engine alignments. This specialized mechanics minimizes lower-unit chatter while ensuring steady propeller tracking when backing down on massive game fish.

Digital Power Management Setup

Digital electronic control networks integrate seamlessly with the electric steering system to handle intensive house power needs automatically. This advanced setup safely provides up to 96 net amps to sustain modern multifunction displays and gyro stabilizers without battery drain.

Advanced Fiberglass Hull Application

Large offshore center consoles, multi-engine express boats, and sports cruisers from 30 to 45 feet are the target vessel application for this 25-inch outboard. The mid-length shaft delivers exceptional leverage and structural vibration dampening when driving through steep waves.

Cowling Access And Lubrication

Fast access to critical checking points is provided by a multi-piece outer cowling structure that cuts service times down significantly. Changing the massive internal fluid volume remains completely clean thanks to an engineered drain plug location that prevents spilling oil. Pro Tip from the Shop: Pull the gear lube plugs at the dock and use a specialized lower unit pump to push fresh oil from the bottom up, ensuring zero air pockets form inside the heavy-duty gear housing.