Performance Data
RPM | MPH | GPH | MPG |
|---|---|---|---|
| 1000 | 6.5 | 1.7 | 3.91 |
| 1500 | 6.5 | 1.7 | 3.91 |
| 2000 | 9.0 | 3.4 | 2.63 |
| 2500 | 12.6 | 5.3 | 2.40 |
| 3000 | 16.3 | 6.9 | 2.37 |
| 3500 | 27.9 | 8.3 | 3.38 |
| 4000 | 33.6 | 10.9 | 3.08 |
| 4500 | 38.2 | 13.8 | 2.78 |
| 5000 | 42.9 | 18.2 | 2.36 |
| 5500 | 47.3 | 22.7 | 2.09 |
| 6100 | 52.8 | 31.4 | 1.68 |
Sea Hunt Ultra 255 SE
| Length | 24' 11" |
|---|---|
| Beam | 8' 9" |
| Dry Weight (Boat Mfr. Pub) | 4,600 lbs |
| Maximum HP | 350 hp |
| Fuel Capacity | 120 gal |
| Weight as Tested | 6,129 lbs |
F350XSA2
| Horsepower | 350 hp |
|---|---|
| Induction | EFI/VCT/DOHC |
| Displacement | 4.3L |
| Weight (Estimated) | 629 lbs |
| Gear Ratio | 1.75:1 |
Engine Mounting Height
| Mounting Hole Position | #2 |
|---|---|
| Ventilation Plate Height | 3/4" Above Boat Bottom |
Propeller(s)
| Series | Saltwater Series II |
|---|---|
| Diameter x Pitch | 15-1/4 x 18 |
| Yamaha Part # | 6CE-45934-20-00 |
| Propeller Material | Stainless Steel |
Test Conditions
| Number of People | 2 |
|---|---|
| Air / Water Temperature (Fahrenheit) | 69° F / 65° F |
| Elevation (in feet above sea level) | 673' |
| Wind Velocity | 5-10 MPH |
⚡ Strong, Confident Acceleration
The Ultra 255 SE gets on plane quickly and responds instantly to throttle input.
Yamaha performance numbers:
Time to Plane: 4.58 seconds
0–30 MPH: 7.15 seconds
This gives you:
Smooth, predictable takeoff
Easy control in varying sea conditions
Strong performance with passengers, fuel, and gear onboard
🚀 Excellent Top-End Speed
Under Yamaha test conditions, this model reached:
➡️ Top Speed: 52.8 MPH at 6,100 RPM
Perfect for:
Fast cruising
Quick runs to your favorite spots
Staying ahead of shifting weather
⛽ Impressive Cruising Efficiency
One of the most attractive aspects of this setup is how efficient it is for a single 350-hp engine.
Real test numbers:
3,000 RPM → 16.3 MPH → 2.37 MPG
3,500 RPM → 27.9 MPH → 3.38 MPG
4,000 RPM → 33.6 MPH → 3.08 MPG
What this means for you:
Excellent mid-range economy for everyday cruising
Great balance of speed and fuel use
More time on the water, less time at the fuel dock
🌊 Smooth, Dry, and Versatile
The Ultra 255 SE is designed for ultimate dual-purpose use:
Plenty of seating and comfort for family outings
A deep bow and solid hull design for dryer rides
Great capability for inshore, nearshore, and light offshore trips
Yamaha’s 4.3L V6 provides the torque you want in SWFL chop
🔧 Yamaha-Optimized Performance Setup
Yamaha tested this boat with:
15¼″ x 18 pitch stainless steel prop
#2 mounting hole
Ventilation plate ¾″ above bottom
Real-world performance varies based on load, fuel, passengers, sea state, and bottom condition — but this bulletin gives you a true performance baseline to compare with.
💡 What This Means for You
Choosing the Ultra 255 SE with the Yamaha F350 gives you:
✔ A sporty, powerful 25-ft platform
✔ Top speeds over 52 MPH
✔ Excellent cruising efficiency, especially around 3,000–4,000 RPM
✔ Lower maintenance and cost vs. twin-engine rigs
✔ Yamaha reliability, resale strength, and low vibration performance