Outboard · propeller size
Yamaha XF425USA2 / LXF425USA2 (XTO) propeller size
The Yamaha XF425USA2 / LXF425USA2 (XTO) is a 425 hp outboard with a 1.79:1 gearcase. In one published sea trial it ran 6,050 rpm at full throttle on 16.375 in props of 20 in pitch. The right prop lands full throttle in the engine's range with your normal load.
Power425 hprated
Gearcase1.79:1ratio
Sea trials1published tests
Pitch run20 inin those tests
Free check
MotorYamaha XF425USA2 / LXF425USA2 (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
XF425USA2 / LXF425USA2 at a glance.
- Maker
- Yamaha
- Model
- XF425USA2 / LXF425USA2 (XTO)
- Power
- 425 hp
- Gearcase ratio
- 1.79:1
- Full-throttle rpm in published tests
- 6,050 rpm
- Props in those tests
- 16.375 in diameter, 20 in pitch
- Prop lines in those tests
- Yamaha XTO Offshore
Sea trials
Boats with a Yamaha XF425USA2 / LXF425USA2 (XTO) and what they ran.
| Boat | Prop | WOT rpm | Speed | Conditions | Source |
|---|---|---|---|---|---|
| Valhalla V-37 · 36.75 ft | 16.375 × 20 in XTO Offshore, stainless, 3-blade | 6,050 | 50.7 kn | 2 × 425 hp · 6,773 kg (14,932 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 XF425USA2 / LXF425USA2 (XTO).
What rpm did the Yamaha XF425USA2 / LXF425USA2 (XTO) reach at full throttle in published tests?
6,050 rpm across one published test, with top speeds of 50.7 kn. Each test is listed above with its source.
What prop size did boats with a Yamaha XF425USA2 / LXF425USA2 (XTO) run?
16.375 × 20 in on the Valhalla V-37. The right size for your boat depends on its weight, hull and load; the free check works it out.
What is the Yamaha XF425USA2 / LXF425USA2 (XTO)'s gearcase ratio?
1.79:1, per Yamaha's published data.