Engine Type
Racing Outboard
Horsepower
450
Engine Model
450R
Boat Brand
Harris
Boat Model
Grand Mariner 250
Boat Type
Pontoon
Performance Summary
Top Speed
(mph @ rpm)
56.7 mph/6425 rpm
Acceleration
0 - 20 mph (seconds)
3.73
Acceleration
0 - 30 mph (seconds)
5.99
Test Date
March 14, 2023
Air Temperature (°F)
24
Elevation (FT)
980
Sea State
Choppy
Wind Velocity Range (MPH)
15
Fresh/Salt Water
Freshwater
| Details |
|---|
Engine Type
Racing Outboard
Horsepower
450
Engine Model
450R
Boat Brand
Harris
Boat Model
Grand Mariner 250
Boat Type
Pontoon
| Engine | |
|---|---|
| Number of Engines | 1 |
| Engine | 450R |
| Horsepower | 450 |
| Cylinders | 8 |
| Drive or gear model and ratio | HD Straight 1.60 |
| Mounting Bolt Hole | 3 |
| Engine Height (in) | 1.5 |
| Engine Setback (in) | 12.5 |
| Engine Length (in) | 20 |
| Propeller | |
|---|---|
| Mercury Name | Enertia |
| Material | Stainless Steel |
| Pitch | 17 |
| Number of Blades | 3 |
| Boat | |
|---|---|
| Boat Brand | Harris |
| Boat Model | Grand Mariner 250 |
| Boat Type | Pontoon |
| Boat Material | Aluminum |
| Length (ft) | 27.4 |
| Beam (ft) | 8.5 |
| Fuel Tank Capacity (gal) | 50 |
| Steering Type | Power Steering |
| Dry Boat Weight (lbs) | 4,843 |
| Performance |
|---|
| RPM Range | Speed (MPH) | Fuel Consumption (GPH) | Fuel Consumption (MPG) | Range (Miles) |
| 600 | 2.3 | 0.8 | 2.8 | 142 |
| 1000 | 4.6 | 1.6 | 2.8 | 141 |
| 1500 | 7.9 | 3.3 | 2.4 | 118 |
| 2000 | 9.1 | 5.6 | 1.6 | 80 |
| 2500 | 14.1 | 6.7 | 2.1 | 105 |
| 3000 | 18.8 | 8.8 | 2.1 | 107 |
| 3500 | 23 | 11.5 | 2 | 100 |
| 4000 | 29 | 14.6 | 2 | 99 |
| 4500 | 36.3 | 17.9 | 2 | 101 |
| 5000 | 42.5 | 24.3 | 1.7 | 87 |
| 5500 | 47 | 30.1 | 1.6 | 78 |
| 6000 | 52 | 40.5 | 1.3 | 64 |
| 6400 | 55.6 | 45.2 | 1.2 | 61 |