Yamaha Offshore Outboards – 450HP XTO & 350HP V6 4.3L

Unmatched Offshore Power

Yamaha’s offshore lineup is built for serious captains, anglers, and luxury boaters who demand strength, reliability, and advanced marine technology. At the top of this lineup sit two powerhouse options: the Yamaha 450HP XTO Offshore V8 and the Yamaha 350HP V6 4.3L Offshore. Both engines deliver commanding performance for large center consoles, sportfishers, and offshore cruisers—whether you need the ultimate flagship power or a balanced mix of muscle and efficiency.

Lineup Snapshot

• Yamaha XTO 450 (450 XTO Yamaha): Flagship V8 with integrated steering, DEC, and seamless Helm Master EX. Built for the largest offshore boats and multi-engine rigs.
• Yamaha 350HP V6 4.3L: All-new, larger-displacement V6 delivering serious torque and smoother efficiency for big center consoles and sport boats.

Pricing & Availability

Looking for Yamaha XTO 450 price or 350HP Yamaha outboard price? Final pricing depends on shaft length, rotation (std/counter), rigging (DEC/Helm Master EX), and multi-engine configuration. Open product cards for live pricing/ETA or request a written quote with hull, typical load, desired WOT RPM, and control/steering options.

Saltwater Readiness

Both the 450HP XTO and 350HP V6 4.3L are engineered for saltwater/offshore duty: anti-corrosion coatings, robust charging systems, and cooling/exhaust designs optimized for heavy seas and extended runs. Flush after use and follow Yamaha’s maintenance intervals.

Integrated Steering & Control (XTO callout)

• Built-in electric-hydraulic steering (no external pump), tighter helm feel, reduced rigging clutter.
• Native DEC and Helm Master EX compatibility (joystick, SetPoint®, Autopilot integration, Pattern Shift).
• Improved low-speed authority for docking, station-keeping, and tight-quarter maneuvers.

Rigging Options

Single, twin, triple, or quad configurations available depending on hull certification. Choose shaft length, rotation pairs, and steering packages to match transom layout and target WOT range.

Warranty & Support

New Yamaha offshore outboards include a Yamaha limited warranty (term varies by program/region). See product pages for current coverage and registration. PartsVu supports ownership with OEM service kits, rigging components, and fast nationwide shipping.

Maintenance Snapshot

Adhere to the 100-hour/annual baseline (engine oil/filter, gear lube, fuel filters, spark plugs, anodes, water-pump inspection). Shorten intervals for harsh commercial/heavy offshore duty. Always use OEM parts/fluids and dealer calibrations for DEC/Helm Master EX systems.

Yamaha 450HP XTO Offshore Outboard – The Pinnacle of Power

The 450HP XTO Offshore is Yamaha’s flagship engine, designed for the biggest offshore boats. With integrated steering, DEC (Digital Electronic Control), and massive displacement, it provides unmatched torque, thrust, and control in all conditions. Perfect for heavy offshore hulls, long-distance runs, and multi-engine configurations, the XTO delivers both strength and sophistication.

Key Features – Yamaha 450 XTO

• Flagship 450HP output built for the largest offshore vessels
• Integrated steering and Digital Electronic Control (DEC) for precise handling.
• Massive displacement for torque-rich acceleration
• Exceptionally low-speed thrust for docking and positioning
• Advanced cooling & exhaust for long-term durability
• Seamless Helm Master EX integration with joystick control

Best For: Offshore anglers, captains of luxury yachts, and professional operators who demand maximum horsepower, torque, and cutting-edge integration.

Yamaha 350HP V6 4.3L Offshore Outboard – The Next Evolution

The Yamaha 350HP V6 4.3L Offshore introduces a new era of offshore performance with a larger displacement V6. Designed for large sport boats and offshore fishing machines, this motor balances strong torque, smooth operation, and fuel efficiency. It’s the ideal choice for boaters who want serious offshore confidence without stepping up to the massive 450HP.

Key Features – Yamaha 350 V6 4.3L

• All-new 4.3L V6 design for more torque and acceleration
• Strong mid-range power for heavy offshore loads
• An Advanced EFI system designed for improved efficiency and reliability.
• Proven Yamaha durability is built into every component
• Available multi-engine setups for larger offshore rigs

Best For: Offshore anglers, families, and sport boaters who need a balance of strength, reliability, and fuel efficiency for serious offshore adventures.

Why Choose Yamaha Offshore Outboards?

• Top-tier power solutions for various offshore requirements.
• Fuel efficiency is engineered into both V6 and V8 platforms
• Reliability and innovation that is trusted worldwide by professional captains
• Flexibility to rig in single, twin, triple, or quad setups

Whether you choose the muscle and technology of the 450HP XTO or the versatility and efficiency of the 350HP V6, Yamaha’s offshore lineup is designed to give you the confidence to run harder, fish longer, and cruise further.

Frequently Asked Questions – 450HP XTO & 350HP V6 4.3L

Q: Is the Yamaha XTO 450 worth it over the 350 V6?
A: Choose XTO 450 for the largest/heaviest hulls, multi-engine offshore setups, and full Helm Master EX/integrated-steering control. Choose 350 V6 4.3L for big-boat confidence with a focus on efficiency, strong mid-range torque, and lighter rigging.

Q: How much does a Yamaha XTO 450 cost (Yamaha XTO 450 price)?
A: Price varies by shaft length, rotation, controls, and installation scope. Check product cards for live pricing or request a quote.

Q: What’s special about the XTO’s integrated steering?
A: It embeds electric-hydraulic steering inside the mid-section for precise control, reduced helm effort, cleaner rigging, and seamless Helm Master EX joystick/autopilot features.

Q: Are these outboards suitable for saltwater?
A: Yes. Both are designed for offshore saltwater use; flush after each trip and follow Yamaha’s maintenance schedule.

Q: Do they require DEC and dealer installation?
A: Yes — DEC engines must be installed and configured by an authorized Yamaha dealer, especially with Helm Master EX.

Q: Can I run twins, triples, or quads?
A: Yes. Both the XTO 450 and 350 V6 4.3L support multi-engine configurations where the hull is rated for it.

Q: Where can I find specs like weight, alternator output, and WOT RPM?
A: Open each model’s product page for weight, dimensions, gear ratio, alternator output, and WOT RPM range.