performance-test/217

Engine Type

Racing Outboard

Horsepower

450

Engine Model

450R

Boat Brand

Harris

Boat Model

Grand Mariner 250

Boat Type

Pontoon

Back to Results
Download PDF Share
Back
PDF

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
  • Conditions
  • Engine
  • Propeller
  • Boat
  • Performance
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