Yamaha F300XSB 300HP Outboard – 25in Shaft, Digital Electronic Steering, V6
For tight transoms, Yamaha F300XSB supplies 300 horsepower. A 25-inch shaft rounds out the rigging. Common on offshore center consoles and sport boats. Owners choose it for steady output without excess weight.
- 300 horsepower, ready to run
- 25-inch shaft, standard fit
- Integrated Digital Electronic Steering
- V6 engine, proven configuration
- Straightforward to service and maintain
Description
Navigate heavy offshore chop precisely using the DES-equipped Yamaha F300XSB for your center console. The massive 4.2-liter block utilizes fly-by-wire technology to deliver explosive midrange acceleration, pushing heavy twin-engine coastal vessels through treacherous inlets smoothly. Verifying your twin-engine bracket guarantees this yamaha 300hp integrated digital electric steering aligns securely without starving the water pump in heavy swells.
Eradicate messy external hydraulic cylinders on your transom completely by utilizing the integrated Digital Electric Steering system. You command instantaneous directional changes and precise dock maneuvers without fighting stiff physical linkage. Yamaha casts the 267 kg assembly using specialized anti-corrosion marine aluminum. This structural barrier stops rapid galvanic decay when repowering premium offshore skiffs in high-salinity coastal environments.
Key Features of Yamaha F300XSB
- Integrated Digital Electric Steering: Eliminates messy external hydraulic cylinders and pumps, delivering sports-car-like handling and zero steering fatigue during long offshore runs.
- Digital Electronic Control: Translates hand movements into instant electronic commands, eliminating mechanical cable slop during precise marina maneuvering.
- 4.2-Liter DOHC Block: Breathes massive volumes of clean air efficiently, generating 300 horsepower effortlessly to lift heavy fiberglass hulls onto plane.
- 25-Inch Extra-Long Shaft: Reaches deep below elevated offshore transoms, keeping the propeller fully engaged in clean undisturbed water.
- 50-70 Amp Charging Alternator: Generates massive electrical current continuously, keeping deep cycle house batteries fully charged for heavy-duty marine electronics.
- 1.75:1 High-Speed Gearcase: Spins aggressive high-pitch propellers efficiently, translating massive big block torque directly into forward vessel momentum.
- Multi-Point Sequential EFI: Meters gas perfectly into the cylinders, delivering crisp throttle response and maximizing fuel efficiency across the operating range.
- Hydraulic Power Trim: Adjusts the running angle dynamically via the binnacle switch, optimizing bow attitude across aggressive lake swells.
- Anti-Corrosion Finish: Blocks severe galvanic decay physically, protecting the aluminum powerhead block across decades of daily saltwater exposure.
- Clean Four-Stroke Operation: Burns fuel with strict efficiency, ensuring peak performance while meeting modern clean-air environmental standards globally.
Why Choose Yamaha F300XSB
This advanced 25-inch block acts strictly as a high-end fly-by-wire power plant featuring built-in electric steering. Substituting a standard mechanical control model sacrifices electronic shifting entirely. Upgrading your digital throttle syncing network is mandatory for smooth dual-engine communication.
- Verify your twin-engine transom bracket accommodates a 25-inch shaft length safely.
- 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, premium fiberglass skiffs, and twin-engine coastal vessels demanding a 25-inch shaft and Helm Master EX compatibility. Operating as a highly responsive digital drive equipped with integrated DES, it translates electronic throttle data instantly, keeping twin-engine performance hulls tracking perfectly straight at high cruising speeds. It thrives in competitive offshore environments where balancing massive thrust requires precise fly-by-wire power.
Warranty, Support and Maintenance
Authorized recreational operation receives a 3-Year Limited Warranty alongside exceptional factory support. Registered commercial applications fall under a strict 1-Year Limited Warranty with zero corrosion coverage 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.
Yamaha F300XSB Specs
| Brand | Yamaha |
| Full Model Code | F300XSB |
| Country of Origin | Japan |
| Engine Family/Series | V6 Offshore DES Integrated |
| Engine Type | V6 (60°), DOHC, 24-Valve |
| Displacement | 4.2L |
| Horsepower | 300 HP |
| Full Throttle RPM Range | 5000-6000 |
| Fuel Induction System | EFI |
| Alternator Output | 50-70 Amps |
| Gear Ratio | 1.75:1 |
| Shaft Length | X: 25in |
| Dry Weight | 267 kg |
| Bore x Stroke | 96.0x96.0mm |
| Starting & Steering System | Electric / Integrated Digital Electric Steering (DES) |
| Trim/Tilt Method | Power Trim & Tilt |
| Oil Capacity | 6.3L |
| Recommended Fuel | 89 Octane |
| Standard Warranty | 3-Year |
| Application | High-tier offshore hulls with Helm Master EX and integrated electric steering (25in). |














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