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Honda15 HP
Honda BF15
2016 · gasoline
$2,200.00
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New
Yamaha
Yamaha 450HP XTO
$29,500.00
450 HP V‑8 direct‑injection four‑stroke outboard engine with integrated electric steering and advanced electronics for offshore performance.
Horsepower
450 HP
Fuel Type
gasoline
Year
2023
Displacement
5.6L
Stroke
4-stroke
Rated Output
336 kW/ 450 mhp
Rated Speed
6000rpm
In Stock (3 available)
Free shipping on orders over $500
90-day warranty included
Description
The Yamaha 450 HP XTO Offshore is Yamaha’s flagship V‑8 four‑stroke outboard engine designed for large offshore boats and high‑performance applications. It combines direct fuel injection, integrated digital electric steering, and premium engineering to deliver strong throttle response and efficiency.
Specifications
SKUY077712
BrandYamaha
CategoryOutboard Engines
ConditionNew
Horsepower450 HP
Fuel Typegasoline
Year2023
Displacement5.6L
No. of Cylinders8 cylinders
Stroke4-stroke
Shaft Length25
Weight972.00 lbs
Rated Output336 kW/ 450 mhp
Rated Speed6000rpm
Cylinder Bore x Stroke96 mm × 96 mm / 370.78 in × 3.78 in
Combustion System4-stroke, DOHC, direct fuel injection (DI)
AspirationNatural
Alternator70- amp
Dry Weight441 kg / 972 lbs
ControlsFully digital controls
Frequently Asked Questions
What is the Yamaha 450HP XTO Offshore?
The Yamaha 450HP XTO Offshore is a premium, high-performance V8 four-stroke outboard motor designed specifically for offshore boats requiring extreme power, durability, and smooth operation.
What engine configuration does the XTO 450 use?
It features a 5.6-liter naturally aspirated V8 engine with DOHC (Dual Overhead Camshafts) and 32 valves, delivering strong torque, excellent fuel efficiency, and smooth power delivery.
How much horsepower does the Yamaha XTO 450 produce?
The engine produces 450 horsepower at 6000 RPM, making it one of the most powerful production outboard motors available.
What fuel type does the Yamaha 450 XTO require?
It operates on regular unleaded gasoline with a minimum octane rating of 89, eliminating the need for expensive premium fuel.
What is the engine displacement of the Yamaha XTO 450?
The engine displacement is 5.6 liters (5559 cc), providing exceptional torque and offshore performance.
What is the full throttle RPM range?
The recommended wide-open throttle (WOT) range is 5000 – 6000 RPM, ensuring optimal performance and longevity.
Does the Yamaha 450 XTO have direct fuel injection?
Yes — it uses high-pressure direct fuel injection, operating at up to 2900 PSI, which improves fuel efficiency, throttle response, and cold-start performance.
What is the weight of the Yamaha 450 XTO?
963 lb (437 kg) 988 lb (448 kg) 1010 lb (458 kg)
What shaft lengths are available?
25″ (X-Long) 30″ (XX-Long) 35″ (Ultra-Long)
Does the Yamaha 450 XTO feature integrated steering?
Yes — it includes integrated electric power steering, eliminating external hydraulic systems and providing precise handling, reduced steering effort, and easier installation.
What boats are best suited for the Yamaha 450 XTO?
Large center console boats Offshore fishing vessels High-performance boats Luxury sport yachts Multi-engine offshore platforms
How fuel-efficient is the Yamaha 450HP XTO?
Despite its high output, the engine is highly fuel-efficient thanks to its direct injection system, high compression ratio (12.3:1), and optimized combustion design.
Is the Yamaha XTO 450 suitable for saltwater use?
Yes — it is specifically engineered for harsh offshore saltwater environments, featuring corrosion-resistant components and advanced cooling protection.
What maintenance does the Yamaha 450 XTO require?
Engine oil & filter changes Gearcase oil replacement Water pump inspections Fuel filter replacement Cooling system flushing
What makes the Yamaha 450 XTO unique compared to competitors?
Largest displacement in its class Integrated electric steering Direct injection technology Industry-leading charging output Legendary Yamaha reliability
