Outboard motor · 450 HPYamaha XF450XS
Electronic control lever Drive-by-Wire (DEC)Steering: integrated electric (DES)Helm Master EX Level 2–4 (electric steering DES)Installation and rigging at the GRAND BOATS Poland service centre in Łężyce. Sold in cooperation with an authorised Yamaha dealer; manufacturer warranty 3 + 2 years at an authorised Yamaha service.
Yamaha XF450XS — 450 HP
Yamaha XF450XS is a four-stroke outboard motor rated at 450 HP (331,0 kW at the propeller shaft). Engine: 32-zaworowy, DOHC z VCT, 60° V8 (XTO Offshore), displacement 5559 cm³, wtrysk paliwa. Dry weight: 447–468 kg.
A motor with integrated Yamaha DES digital electric steering: no pump or hydraulic hoses in the boat, a lighter installation, precise handling and ready for Helm Master EX with a joystick. Throttle and shift are digital (Drive-by-Wire). The model has electric start and power trim and tilt (PTT) — the motor angle is set with a button, even while underway.
Shaft length X (25″ / 635 mm). The shaft is matched to the boat’s transom height so that the anti-cavitation plate runs just below the water surface. Transom height for this shaft according to Yamaha: 640 mm.
The XTO Offshore series are Yamaha’s flagship V8 outboards for large offshore boats: huge power, thrust and a strong alternator for onboard electronics.
Fuel consumption at full power according to Yamaha: 144,8 L/h @6000 obr/min. The XF450XS is within the power range the shipyard recommends for the GRAND G850, GRAND D950 Adventure, GRAND D950 Explorer, GRAND D950 Dive. At the GRAND BOATS Poland service centre in Łężyce near Gdynia we install the engine, do the rigging and choose the propeller. The engine is supplied in cooperation with an authorised Yamaha dealer; the manufacturer warranty (3 + 2 years) is carried out by an authorised Yamaha service.
Yamaha XF450XS
| Maximum output (at propeller shaft) | 450 KM (331,0 kW) |
|---|---|
| Full-throttle range | 5000–6000 rpm |
| Idle speed | 650–750 rpm |
| Fuel consumption (reference data) | 144.8 L/h @6000 rpm |
| Engine type | 4-stroke, 32-valve, DOHC with VCT, 60° V8 (XTO Offshore) |
| Displacement | 5559 cm³ |
| Bore × stroke | 96,0 × 96,0 mm |
| Compression ratio | 12,3:1 |
| Fuel system | Fuel injection |
| Lubrication | Wet sump |
| Engine oil capacity | 7.8 L / 7.5 L (with / without filter change) |
| Ignition | TCI |
| Spark plug | ILMAR7H-9 |
| Alternator | 102 A (battery charging: 96 A) |
| Trim | PTT: stepless |
| Gear ratio | 1,79 (25/14) |
| Gear shift | F-N-R (digital, DEC) |
| Steering | Digital electric steering (DES) |
| Propeller rotation | Right (standard) |
| Shaft lengths in the family | X, U, E |
| Overall height (X shaft) | 2059 mm |
| Transom height (X shaft) | 640 mm |
| Beam | 652 mm |
| Weight (dry) | 447–468 kg |
| Steering angle | 31° each way |
Source: Yamaha Product Information Guide 2026 (F450A family). Fuel consumption — manufacturer’s reference data.
