Yamaha LF300USB 300HP Outboard – 30in Shaft, Counter Rotation

Massive twin-engine center consoles conquer steep morning swells instantly once the Yamaha LF300USB counter-rotating outboard hits the transom. The 4.2-liter V6 translates fly-by-wire throttle inputs into explosive midrange acceleration, pushing heavy 30-inch draft coastal cruisers safely through treacherous inlets without mechanical cable hesitation. Verifying your twin-engine bracket guarantees this digital steer counter rotating outboard aligns securely without starving the internal cooling intakes.

Eradicate exhausting mechanical steering friction completely by utilizing the integrated Digital Electric Steering system for absolute sports-car-like handling. You pilot fast twin-engine coastal vessels with single-finger precision, letting the left-hand gearcase actively cancel starboard thrust pull. Yamaha casts the 271 kg assembly using specialized anti-corrosion marine aluminum. This structural barrier stops rapid galvanic decay when repowering luxury offshore yachts in high-salinity coastal environments.

Key Features of Yamaha LF300USB

- Digital Electronic Control (DEC): Translates hand movements into instant electronic commands, eliminating mechanical cable slop during precise marina maneuvering.
- 30-Inch Ultra-Long Shaft: Reaches deep below elevated offshore transoms, keeping the propeller fully engaged in clean undisturbed water during heavy chop.
- Hydraulic Power Trim: Adjusts the running angle dynamically via the binnacle switch, optimizing bow attitude across aggressive offshore swells.
- Integrated Digital Electric Steering (DES): Eliminates messy external hydraulic cylinders and pumps, delivering sports-car-like handling and zero steering fatigue during long runs.
- 50-70 Amp Charging Alternator: Generates massive electrical current continuously, keeping deep cycle house batteries fully charged for heavy-duty marine electronics.
- Anti-Corrosion Castings: Blocks severe galvanic decay physically, protecting the aluminum powerhead block across decades of daily saltwater exposure.
- Through-Prop Exhaust: Channels toxic combustion gases directly underwater, keeping the aft operator station completely free of choking smoke.
- Accessible Oil Drain: Simplifies routine crankcase lubrication changes, saving significant time during seasonal maintenance prep without specialized tools.
- Counter-Rotating Gearcase: Cancels the massive lateral thrust of a starboard engine, keeping twin-engine performance hulls tracking perfectly straight underway.
- Clean Four-Stroke Combustion: Burns fuel highly efficiently without oil mixing, easily meeting strict local waterway emissions regulations and EPA standards.

Why Choose Yamaha LF300USB

This advanced 30-inch block acts strictly as a high-end fly-by-wire power plant designed for the port side of dual-engine applications. Substituting a mechanical control model sacrifices electronic shifting entirely. Upgrading your digital throttle syncing network is mandatory for smooth engine communication.

- Confirm a 30-inch vertical drop from the massive mounting bracket to the keel line.
- Link the DEC module to your master binnacle to synchronize shift commands perfectly.
- Navigate restricted coastal fisheries legally utilizing advanced four-stroke combustion.

Ideal Application and Vessel Fitment

This 300-horsepower drive-by-wire block is engineered strictly for modern deep-V center consoles, large luxury offshore catamarans, and heavy twin-engine performance hulls demanding a 30-inch shaft. Operating as the port-side drive in a digital twin engine offshore setup, it actively cancels starboard propeller torque to keep the vessel tracking perfectly straight at high cruising speeds. It thrives in blue water tournament fishing where balancing massive thrust requires precise fly-by-wire power without complex tracking adjustments.

Warranty, Support and Maintenance

Authorized recreational operation receives a 3-Year Pleasure Warranty alongside exceptional factory support. Registered commercial applications fall under a strict 1-Year Commercial Warranty with separate terms applied to the block. Scheduled maintenance requires replacing gearcase lubricants and changing oil filters at manual-specified intervals. Always save all physical service records. Your engine serial number acts as the only way to source exact genuine replacement parts. For product details and order support, Mulmotor offers assistance before your purchase is placed.