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Yamaha F350XSA 350HP – DEC 25″ Shaft Standard Rotationin Gray
Engine Performance: 5.3L V8 displacement massive torque
Fuel Efficiency: Variable Camshaft Timing optimized efficiency
Shaft and Build: 25-inch shaft classic gray finish
Control System: Digital Electronic Control (DEC) system
Marine Protection: High-capacity alternator marine-grade cooling
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Description
Yamaha F350XSA 350HP Integrated Steering
The Yamaha F350XSA 350HP outboard motor is a masterpiece of digital marine propulsion featuring a precision-engineered V6 4.3L 24-valve DOHC engine architecture in Classic Gray. This high-performance powerhead utilizes a massive 4.3-liter displacement while maintaining a competitive dry weight of 529 lbs to ensure an elite power-to-weight ratio for modern offshore vessels. Its 25-inch shaft configuration is specifically designed for high-performance platforms requiring advanced outboard engine technology for the precision and smoothness of integrated digital electric steering.
Technical Specifications of Yamaha F350XSA
- Robust V6 4.3L DOHC architecture delivers 350 horsepower with high volumetric marine efficiency.
- Sophisticated 240 kg design includes a 25-inch long shaft for offshore boat transom configurations.
- Precision Multi-Point EFI ensures consistent combustion across the 5000-6000 throttle RPM band.
- Integrated Digital Electric Steering (DES) provides effortless vessel handling and precise control at all speeds.
- Digital Electronic Control (DEC) and Helm Master EX compatibility allow for smooth shifting and helm management.
- Massive 50-70 amp alternator output ensures navigation displays and digital electronics remain fully powered.
- Investment is protected by a limited 3-year factory warranty and Japanese maritime engineering excellence.
V6 4.3L Integrated Command
The F350XSA utilizes a 24-valve V6 configuration within its robust 4.3-liter engine block to maximize air intake and torque. This mechanical design ensures rapid and responsive hole-shot acceleration even when pushing heavily loaded offshore vessels through chop. Captains experience smooth power delivery and significantly reduced vibration when cruising through heavy coastal sea conditions with integrated digital command.
Integrated DES Steering
This 350HP outboard features Integrated Digital Electric Steering (DES) to provide a smooth and responsive boating experience without external hydraulic lines. This digital electric steering system provides a clean bilge while offering adjustable steering friction for the captain. Professional anglers can enjoy effortless vessel command during long offshore tournament days without operator fatigue.
25-Inch Offshore Shaft
The Yamaha 350HP motor integrates a 25-inch long shaft explicitly calibrated for modern offshore vessel transom dimensions. This optimal lower unit depth prevents propeller aeration in following seas while maintaining a secure grip on the water surface. US offshore boaters gain improved steering authority and stable tracking during aggressive maneuvers in open sea conditions during transit.
Helm Master EX Integration
The 350HP outboard is fully compatible with Yamaha Helm Master EX for advanced vessel positioning and joystick control at the helm. This system allows for precise movement in tight quarters and automated fishing patterns for serious pelagic anglers. Captains can easily manage multiple outboards and integrate with digital displays for a complete and modern luxury helm solution.
Routine Maintenance Protocol
This Digital V6 engine is built with high-quality sacrificial anodes to prevent destructive galvanic corrosion daily. Regular maintenance of the power trim and tilt system ensures smooth engine adjustments in saltwater coastal environments. Pro Tip: Flush the engine with fresh water after every launch to maintain the cooling system and protect internal components from salt accumulation.
Yamaha F350XSA 350HP V6 Specs (Gray)
| Brand | Yamaha Outboards |
| Model Name | F350 V6 Offshore (Gray) |
| Part Number/SKU | F350XSA |
| Technology Category | EFI 4-Stroke (V6) |
| Engine Architecture | V6 4.3L 24-Valve DOHC |
| Shaft Length | 25-Inch (Long) |
| Rotation | Standard Rotation (Right-Hand) |
| Full Throttle RPM | 5000-6000 RPM |
| Fuel Induction | Precision Multi-Point EFI |
| Alternator Output | 50 - 70 Amps |
| Steering | Integrated Electric Power Steering (DES) |
| Trim System | Power Trim & Tilt |
| Gear Ratio | 1.75:1 |
| Digital Control | Helm Master EX / DEC |
| NMEA Interface | NMEA 2000 Certified |
| Dry Weight | 240 kg (529 lbs) |
| Country of Origin | Japan |
| Standard Warranty | 3-Year Limited |
Yamaha F350XSA 350HP DEC Offshore Technical Guide
The gray Yamaha F350XSA consumes approximately 31.5 gallons per hour at wide open throttle using its 4.3L offshore V6 powerhead. This 25-inch shaft model features Digital Electronic Control for precise throttle response and fuel efficiency. Tracking your gallons per hour rate during cruise allows for highly accurate calculations of offshore fishing range.
The F350XSA utilizes Yamaha’s ACP-221 paint system and oversized internal flushing passages to resist brine accumulation in the 25-inch shaft. These engineering choices exceed ABYC requirements for durability in harsh saltwater environments. Maintain the sacrificial aluminum anode locations to protect the standard rotation gearcase from electrolysis during slip storage.
A standard oil change for the 4.3L V6 powerhead requires 6.7 US quarts of oil with a new high-efficiency filter. Adhering to the FC-W engine oil capacity prevents thermal breakdown during the high-load operation common in offshore conditions. Always allow the oil to settle for five minutes before verifying the level with the dipstick.
The F350XSA alternator generates 70 gross amps to power integrated DEC controls and modern navigation electronics. This system requires a battery with a minimum marine cranking amps rating of 800 MCA for reliable ignition in all weather. Use heavy-duty cables that meet ABYC E-11 standards to avoid voltage drops in the digital system.
The F350XSA standard rotation model typically runs a Saltwater Series II stainless steel propeller pitch between 17 and 21 inches. Proper pitch selection is vital for keeping the engine within the 5000-6000 RPM full throttle window for maximum efficiency. Verify the propeller is balanced to prevent lower unit vibration.
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