Yamaha LXF450USA2 450HP XTO Counter-Rotation DEC 30″

Description

The Yamaha LXF450USA2 pairs 450HP with a 30-inch ultra-long shaft, built with counter-rotation gearing for multi-engine offshore boats. The 5.6-liter V8 displaces 5559cc and weighs 989 lbs dry — positioned between the 25-inch and 35-inch versions in the lineup. Built for mid-to-deep transom configurations, the 30-inch shaft keeps propeller depth and tracking balanced on heavy-duty fiberglass hulls in rough open water.

Peak output holds through a 5000-6000 RPM band, sustaining cruising speed across long tournament distances. The 1.79:1 gear ratio converts combustion force into a flat torque curve, so heavy boats get on plane without burying the stern under load. This Japan-built platform is engineered for stability during long-range deep-sea operations.

Technical Specifications of Yamaha LXF450USA2

• High-pressure direct fuel injection atomizes gasoline at 2900 PSI for efficient combustion across all cylinders.
• A 102-Amp gross alternator generates enough power to keep house battery banks topped off.
• Integrated electric steering replaces complex hydraulic lines with instant digital response at the wheel.
• TotalTilt simplifies trailering and shallow-water operation by tilting the lower unit completely clear.
• A 7.8-liter oil sump supports continuous lubrication during hard wide-open-throttle runs.
• The counter-rotation gearcase balances propeller torque to maintain tracking on multi-engine express cruisers.

32-Valve V8 Block

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

High Pressure Fuel Delivery

Direct fuel induction sprays gasoline straight into the combustion chambers at 2900 PSI for cleaner combustion cycles. That delivery system keeps throttle response immediate and cold starts reliable in changing early-morning coastal conditions.

Counter Rotating Gearcase Profile

Oversized internal gears and a streamlined lower unit maximize hydrodynamic thrust while canceling out steering pull on multi-engine setups. That mechanical setup keeps lower-unit chatter down and propeller tracking steady when backing down on a fish.

Digital Power Management Setup

Digital electronic control integrates with the electric steering system to handle house power needs automatically, supplying up to 96 net amps to run multifunction displays and gyro stabilizers without draining the batteries.

Advanced Fiberglass Hull Application

Large offshore center consoles, multi-engine express boats, and sports cruisers in the 30-45 ft range are the target application for this 30-inch outboard. The mid-length shaft delivers strong leverage and vibration dampening driving through steep waves.

Cowling Access And Lubrication

A multi-piece outer cowling gives fast access to critical checking points, cutting service time down. The drain plug location keeps oil changes clean rather than messy. Pro Tip from the Shop: pull the gear lube plugs at the dock and use a lower unit pump to push fresh oil from the bottom up, keeping air pockets out of the gear housing.