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Yamaha F300XSB 300HP – V6 FourStroke DES Integrated 25-Inch
Yamaha F300XSB 300HP powers demanding commercial vessels efficiently. Rapid acceleration stems from the advanced 24-valve DOHC setup while a high-output 70-amp alternator charges house battery banks continuously.
- 25-inch shaft matches traditional hull setups
- Integrated DES steering eliminates hydraulic lag
- Multi-point electronic injection cuts fleet fuel
- 588-pound dry weight optimizes aft stabilization
- Digital electronic control ensures precise shifting
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Description
Yamaha F300XSB 300HP V6 FourStroke (Gray)
The premium Yamaha F300XSB 300HP delivers elite engineering authority by incorporating fully integrated digital electric steering into an ultra-reliable offshore marine platform. Utilizing an advanced V6 4.2L 24-valve DOHC block, this high-output system leverages multi-point electronic fuel injection to secure superior thermal efficiency across every operational range. Configured with a 25-inch shaft length, this setup delivers a perfect physical transom match for standard multi-engine deep-V tournament boat brackets.
Deploying this specific Yamaha F300XSB ultra long shaft outboard configuration provides unmatched handling response by eliminating external hydraulic lines and steering rams. The standard right-hand rotation gearcase transfers high-torque energy cleanly through a 1.75:1 ratio, maximizing propeller grip while cutting down steering resistance during aggressive tactical maneuvers.
Technical Specifications of Yamaha F300XSB
- Precision multi-point electronic fuel injection optimizes atomization to produce instantaneous throttle response through a 5000-6000 operating range.
- An integrated 25-inch long shaft assembly provides ideal lower unit immersion depths for standard modern center consoles.
- The right-hand standard rotation lower unit features an efficient 1.75:1 gear ratio to maximize torque transfer.
- The integrated Digital Electric Steering package cuts physical feedback while saving critical space inside the rear motor well.
- The high-performance alternator supplies a total of 50 to 70 Amps to keep complex multi-display fishfinders continuously powered.
Advanced Steering and Control Dynamics of Yamaha F300XSB
The factory integrated Digital Electric Steering framework removes old-school hydraulic pumps and lines completely from your transom area. This advanced rigging design delivers instantaneous helm response, making close-quarters joystick docking and tight multi-engine maneuvering effortless for offshore captains.
Digital Instrumentation and NMEA Interface Capability
Full compatibility with Digital Electronic Control binnacles delivers precise throttle synchronization and smooth shifting across all networked powerheads. Built with a standard interface certified for NMEA systems, this outboard exports critical operating diagnostics and real-time fuel burn metrics directly to your console screens.
Corrosion Shields of the 267 kg Gray Platform
This premium saltwater corrosion resistant outboard applies a specialized four-layer paint process over treated aluminum alloys to isolate metals from harsh marine environments. Large passive sacrificial anodes are mounted directly onto the 267 kg frame alongside a 3-Star C.A.R.B. emissions rating to protect vital alloys.
Comprehensive Three Year Factory Warranty
Every engine is backed by a 3-Year Limited manufacturer warranty that highlights the robust industrial reliability of the naturally aspirated platform. This factory protection provides tournament anglers and commercial pilots complete peace of mind when operating far over the horizon.
Long-Term Care Protocols for 25 Inch Gray Units
Routine service intervals are simplified by top-mounted fluid dipsticks and a 6.3L oil capacity that ensures clean wet sump lubrication. Pro Tip from the Shop: Change the engine oil filter every hundred hours to keep the massive 6.3L wet sump clean and always verify that all thermostats actuate uniformly to prevent localized hot spots inside the block.
Yamaha F300XSB 300HP - V6 FourStroke DES Integrated 25-Inch Specs
| Engine type | V6 / DOHC / 24 valves |
| Displacement | 4.2L |
| Bore x stroke | 96 x 96 mm (3.78 x 3.78 in) |
| Horsepower | 300hp at 5500 RPM |
| Full-throttle rpm range | 5000 - 6000 RPM |
| Compression ratio | 10.3:1 |
| Fuel induction | Multi-Point Electronic Fuel Injection |
| Recommended fuel | Octane 89 |
| Ignition | TCI Microcomputer |
| Alternator output | 50 - 70 Amp |
| Gear ratio | 1.75:1 |
| Gear shift | Forward, Neutral, Reverse |
| Shaft length | 25 inch |
| Dry weight | 588 lbs (267 kg) |
| Controls | Digital Electronic Control (DEC) |
| Steering | Integrated Digital Electric Steering (DES) |
| Trim and tilt | Power Trim & Tilt |
| Exhaust | Through Propeller |
| Cooling system | Water, Thermostatic Control |
| Lubrication | Wet Sump |
| Oil capacity | 6.3L (6.7 Quarts) with filter |
| Emissions rating | C.A.R.B. 3-Star |
What's in the Box
- 1x F300XSB 300HP V6 Outboard Motor (Gray, 25" Shaft)
- 1x Factory-Integrated Standard Rotation Gearcase Unit
- 1x Factory-Installed Digital Electric Steering Cylinder
- 1x High-Output Alternator Charging System Assembly
- 1x Multi-Pin Primary Rigging Digital Wire Harness
- 1x User Manual
- 1x Warranty Card
Yamaha F300XSB FAQ
What steering and remote shift command modules are integrated into this 300HP model?
Integrated Digital Electric Steering (DES) and Digital Electronic Control (DEC) drive the drive-by-wire helm tracking on the Yamaha F300XSB 300HP - V6 FourStroke DES Integrated 25-Inch.
What specific cylinder layout and fuel induction network build this 300HP FourStroke block?
A multi-point electronic fuel injection (EFI) 4.2L V6 layout builds the center core of the Yamaha F300XSB 300HP - V6 FourStroke DES Integrated 25-Inch.
What electrical charging ranges, dry body weights, and warranty emissions scales define this model?
Detailed below are the block dimensions, wide-open operating windows, and factory structural metrics applied to the Yamaha F300XSB 300HP - V6 FourStroke DES Integrated 25-Inch system:
| System Parameter | Factory Engineering Specification |
|---|---|
| Powerhead Profile | 4.2-Liter V6 DOHC 24-Valve architecture pulsing out 300hp at 5500 RPM into a standard wet sump lubrication setup |
| Operating RPM Window | 5000 to 6000 RPM full-throttle load range with a 1.75:1 lower unit reduction gearcase step through the propeller |
| Alternator Capacity | 50 to 70 Amp dynamic net charging output scale range matching a clean C.A.R.B. 3-Star environmental emission rating |
| Dry Weight Profile | Weighs a balanced 588 lbs (267 kg) un-fueled assembly weight configuration matching a long 25-inch shaft length |
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