Performance Bulletin
Open 352 — Yamaha XF425 · Twin
Official Yamaha test data, normalized to the Sportsman sheet.
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Performance Test
113 Sportsman Way · Summerville, SC 29483 · 843.376.2628
Top speed
58.5 mph
@ 6,000 rpm
Best cruise
1.37 mpg
31.7 mph @ 3,500 rpm
Cruise range
407 mi
on 297 usable gal
Time to plane
5.86 s
hole shot
0–30 mph
7.20 s
0–20 mph: —
Performance Data
RPM
MPH
GPH
MPG
Range
1,000
6.3
4.0
1.59
472
1,500
8.3
5.6
1.49
443
2,000
9.7
8.9
1.10
327
2,500
12.5
13.9
0.90
267
3,000
21.6
17.7
1.22
362
3,500
31.7
23.2
1.37
407
4,000
37.8
29.2
1.29
383
4,500
43.0
36.4
1.18
350
5,000
47.3
46.9
1.01
300
5,500
52.9
58.6
0.90
267
6,000
58.5
75.5
0.77
229
Range: MPG × 297 usable gal (90% of a 330 gal tank), no reserve held back — same rule on every Sportsman sheet.
Performance Curve
GPH
MPH
MPG
Time to plane
5.86 s
0–20 mph
—
0–30 mph
7.20 s
Engine
Horsepower425 hp each · 850 hp total
InductionDI / VCT / DOHC
Displacement5.6L
Weight (est.)977 lbs each
Gear ratio1.79:1
SteeringYamaha hydraulic
Propellers & Mounting
SeriesXTO Offshore
Diameter × pitch16-3/8 × 21
Blades / material3 · polished stainless
Part number6GR-45976-10-00 / 6GS-45976-10-00
Mounting hole#4
Ventilation plate2" above boat bottom
Test Conditions
Test date26 Feb 2020
Aboard4 people
Weight as tested13,694 lbs
Fuel at test165 gal
Air / water57° F / 52° F
Wind / sea15–20 mph
Elevation0 ft
The normalization
What each brand calls it, and what we print
An em dash means the brand does not measure it. Range is computed on the Sportsman rule, both brands.
Field
Yamaha bulletin
Sportsman sheet
Mercury bulletin
Configuration
Configuration: Twin / Triple
Engines · N × model
Number of Engines
Rig detail
Mounting hole, ventilation plate height
Mounting & setback
Mounting bolt hole, engine height, setback
Propeller
Series, diameter × pitch, part #
Series, pitch, blades, material
Mercury name, pitch, blades, material
Hole shot
Time to Plane
Time to plane
not measured
Acceleration
0–30 mph
0–20 mph and 0–30 mph
0–20 mph and 0–30 mph
Range
not published
computed: MPG × usable fuel
published miles per rpm
Crew
Number of People
Aboard
Test conductor + n
Sea state
not recorded
Wind / sea
Wind velocity, sea state
Top speed
highest rpm row
top row of the curve
stated separately from the table