Yamaha XF425XSA2 / LXF425XSA2 (XTO) propeller size
The Yamaha XF425XSA2 / LXF425XSA2 (XTO) is a 425 hp outboard with a 1.79:1 gearcase. In 2 published sea trials it ran 5,900–6,100 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.
The free check goes up to 400 hp per engine; set the power in the check or use Pro.
Free · no account · under two minutesXF425XSA2 / LXF425XSA2 at a glance.
- Maker
- Yamaha
- Model
- XF425XSA2 / LXF425XSA2 (XTO)
- Power
- 425 hp
- Gearcase ratio
- 1.79:1
- Full-throttle rpm in published tests
- 5,900–6,100 rpm
- Props in those tests
- 16.375 in diameter, 21 in pitch
- Prop lines in those tests
- Yamaha XTO Offshore
Boats with a Yamaha XF425XSA2 / LXF425XSA2 (XTO) and what they ran.
| Boat | Prop | WOT rpm | Speed | Conditions | Source |
|---|---|---|---|---|---|
| Sportsman Open 312 · 31.17 ft | 16.375 × 21 in XTO Offshore, stainless, 3-blade | 6,100 | 54.7 kn | 2 × 425 hp · 4,919 kg (10,844 lb) as tested | sportsmanboatsmfg.com |
| Grady-White Express 330 · 33.5 ft | 16.375 × 21 in stainless, 3-blade | 5,900 | 46.2 kn | 2 × 425 hp · 6,886 kg (15,182 lb) as tested | yamahaoutboards.com |
Other 425 hp outboards.
Cross-brand options appear as other makers' engines reach the data.
About the Yamaha XF425XSA2 / LXF425XSA2 (XTO).
What rpm did the Yamaha XF425XSA2 / LXF425XSA2 (XTO) reach at full throttle in published tests?
5,900–6,100 rpm across 2 published tests, with top speeds of 46.2–54.7 kn. Each test is listed above with its source.
What prop size did boats with a Yamaha XF425XSA2 / LXF425XSA2 (XTO) run?
16.375 × 21 in on the Sportsman Open 312; 16.375 × 21 in on the Grady-White Express 330. The right size for your boat depends on its weight, hull and load; the free check works it out.
What is the Yamaha XF425XSA2 / LXF425XSA2 (XTO)'s gearcase ratio?
1.79:1, per Yamaha's published data.