Yamaha LXF450USA 450HP – XTO Offshore 30″ Shaft Counter Rotationin Gray

Yamaha LXF450USA 450HP Gray Extra-Long

The Yamaha LXF450USA 450HP runs a high-displacement 5.6L DOHC 32-valve V8, finished in Classic Gray for the deepest multi-engine offshore transoms. This direct-injection four-stroke is built to deliver strong torque for the heaviest offshore hulls running two or more engines. The 30-inch extra-long shaft and counter-rotation gearcase are built into Mulmarine’s reliable marine propulsion systems lineup for boats that need neutralized steering torque on long ocean transits.

Peak output holds through a 5000-6000 RPM full-throttle band, running an industry-leading Direct Injection system that sprays fuel at up to 2900 PSI. The 1.79:1 gear ratio and the V8’s compression turn that raw energy into thrust that gets a loaded hull planing under extreme offshore loads. US offshore captains lean on this Japan-engineered XTO platform for its reliability record and the precision DES adds at the helm.

Technical Specifications of Yamaha LXF450USA

• The 5.6L DOHC 32-valve V8 delivers 450 horsepower with high-pressure direct injection.
• The Gray 444 kg build runs on a 30-inch extra-long shaft sized for specialized offshore hulls.
• The counter-rotation (left-hand) gearcase balances steering torque in multi-engine installs.
• Integrated Electric Steering runs with no hydraulic lines or pumps needed.
• High-pressure direct injection (up to 2900 PSI) keeps combustion efficiency high.
• The high-output alternator (90 Amps Net) keeps navigation radar and every onboard system powered.
• Coverage comes from a limited 3-year factory warranty plus a 2-year extended protection plan.

5.6L V8 Offshore Power

The LXF450USA runs a 5.6-liter V8 block for the highest displacement and torque in the Yamaha lineup. The 32-valve DOHC design is built for aggressive hole-shot acceleration as much as effortless mid-range cruising on the heaviest fiberglass center consoles. Captains get real power reserves when pushing through heavy offshore inlets or holding speed against strong currents at full displacement.

High-Pressure Direct Injection

This 450HP outboard runs an industry-leading Direct Injection system that delivers fuel straight into the combustion chamber at high pressure. That technology sharpens fuel atomization and thermal efficiency, which shows up as crisp throttle response and strong top-end speed on large offshore vessels. Boaters get more usable power out of every drop of fuel when exploring far from the nearest marina.

30-Inch Extra-Long Propulsion

The LXF450USA’s extra-long 30-inch shaft is calibrated for deep-V vessel transom dimensions specifically. That immersion depth keeps the propeller from aerating in following seas while holding a secure grip on the water during maneuvers. US boaters get better steering authority and more stable tracking during aggressive maneuvers in open sea conditions.

Integrated Digital Steering (DES)

The LXF450USA runs Integrated Digital Electric Steering (DES), which cuts out the external hydraulic lines, cylinders, and pumps a traditional setup needs. The digital system keeps transom rigging clean while giving the operator adjustable steering friction and precise control. Offshore anglers get to run long tournament days without the fatigue or mechanical lag that comes with docking maneuvers.

Counter-Rotation Torque Balance

The LXF450USA runs a left-hand rotation gearcase built to neutralize propeller torque when paired with a standard-rotation XTO motor. That setup means effortless steering and steady tracking, especially in following seas or during sharp maneuvers. Boaters get better handling and less physical effort keeping the vessel on course over extended offshore fishing trips.

Routine Maintenance Protocol

This digital V8 runs high-quality sacrificial anodes and a quad-thermostat cooling system to keep galvanic corrosion in check. Regular attention to the gearcase lubricant and high-pressure fuel filters keeps this engine mechanically reliable in harsh saltwater. Pro Tip: flush the internal cooling passages with fresh water after every launch to protect the V8 block from internal salt buildup.