Outboard · propeller size
Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO) propeller size
The Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO) is a 425 hp outboard with a 1.79:1 gearcase. In one published sea trial it ran 5,900 rpm at full throttle on 16.375 in props of 21 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 run21 inin those tests
Free check
MotorYamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (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 / XF425USA2 / LXF425XSA2 at a glance.
- Maker
- Yamaha
- Model
- XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO)
- Power
- 425 hp
- Gearcase ratio
- 1.79:1
- Full-throttle rpm in published tests
- 5,900 rpm
- Props in those tests
- 16.375 in diameter, 21 in pitch
Sea trials
Boats with a Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO) and what they ran.
| Boat | Prop | WOT rpm | Speed | Conditions | Source |
|---|---|---|---|---|---|
| Grady-White 375 Freedom · 36.58 ft | 16.375 × 21 in stainless, 3-blade | 5,900 | 49.9 kn | 3 × 425 hp · 9,913 kg (21,855 lb) as tested | yamahaoutboards.com |
Related
Other 425 hp outboards.
Cross-brand options appear as other makers' engines reach the data.
Questions
About the Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO).
What rpm did the Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO) reach at full throttle in published tests?
5,900 rpm across one published test, with top speeds of 49.9 kn. Each test is listed above with its source.
What prop size did boats with a Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO) run?
16.375 × 21 in on the Grady-White 375 Freedom. The right size for your boat depends on its weight, hull and load; the free check works it out.
What is the Yamaha XF425XSA2 / XF425USA2 / LXF425XSA2 (XTO)'s gearcase ratio?
1.79:1, per Yamaha's published data.