Outboard · propeller size
Yamaha XF425XSA2 (XTO) propeller size
The Yamaha XF425XSA2 (XTO) is a 425 hp outboard with a 1.79:1 gearcase. In 2 published sea trials it ran 6,000 rpm at full throttle on 16.375–16.875 in props of 17–21 in pitch. The right prop lands full throttle in the engine's range with your normal load.
Power425 hprated
Gearcase1.79:1ratio
Sea trials2published tests
Pitch run17–21 inin those tests
Free check
MotorYamaha XF425XSA2 (XTO)
FuelPetrol
Boatyours, in the check
Prop todayyours, in the check
The free check goes up to 400 hp per engine; set the power in the check or use Pro.
Free · no account · under two minutesSpecifications
XF425XSA2 at a glance.
- Maker
- Yamaha
- Model
- XF425XSA2 (XTO)
- Power
- 425 hp
- Gearcase ratio
- 1.79:1
- Full-throttle rpm in published tests
- 6,000 rpm
- Props in those tests
- 16.375–16.875 in diameter, 17–21 in pitch
- Prop lines in those tests
- Yamaha XTO Offshore
| Boat | Prop | WOT rpm | Speed | Conditions | Source |
|---|---|---|---|---|---|
| Pathfinder 2700 · 27.58 ft | 16.375 × 21 in XTO Offshore, stainless, 3-blade | 6,000 | 52.2 kn | 1 × 425 hp · 3,238 kg (7,138 lb) as tested | yamahaoutboards.com |
| Bennington 25 RSBAX1 · 27.46 ft | 16.875 × 17 in XTO Offshore, stainless, 3-blade | 6,000 | 42.3 kn | 1 × 425 hp · 2,885 kg (6,360 lb) as tested | stagingsite.yamahaoutboards.com |
Related
Other 425 hp outboards.
Cross-brand options appear as other makers' engines reach the data.
Questions
About the Yamaha XF425XSA2 (XTO).
What rpm did the Yamaha XF425XSA2 (XTO) reach at full throttle in published tests?
6,000 rpm across 2 published tests, with top speeds of 42.3–52.2 kn. Each test is listed above with its source.
What prop size did boats with a Yamaha XF425XSA2 (XTO) run?
16.375 × 21 in on the Pathfinder 2700; 16.875 × 17 in on the Bennington 25 RSBAX1. The right size for your boat depends on its weight, hull and load; the free check works it out.
What is the Yamaha XF425XSA2 (XTO)'s gearcase ratio?
1.79:1, per Yamaha's published data.