Performance Bulletin


Engine: Yamaha XF425USA2
Boat: Cobalt R8
Configuration: Single
Test Date: 15-Mar-2021
Cobalt R8

Performance Bulletin

67 - Cobalt R8

Cobalt R8

Length 27' 10"
Beam 8' 6"
Dry Weight (Boat Mfr. Pub) 6,500 lbs
Maximum HP 600 hp
Fuel Capacity 125 gal
Weight as Tested 8,563 lbs

XF425USA2

Horsepower 425 hp
Induction DI/VCT/DOHC
Displacement 5.6L
Weight (Estimated) 977 lbs
Gear Ratio 1.79:1

Engine Mounting Height

Mounting Hole Position #2

Propeller(s)

Series XTO Offshore
Diameter x Pitch 16-5/8 x 18
Yamaha Part # 6GR-45938-10-00
Propeller Material Polished Stainless Steel

Test Conditions

Number of People 2
Air / Water Temperature (Fahrenheit) 83° F / 75° F
Elevation (in feet above sea level) 918'
Wind Velocity 5-10 MPH

Comments

Test weight includes 80 gallons of fuel, 2 batteries, optional tower, safety and test equipment.

YPB#: PB_COB_R8_XF425_3-16-21_DCK

67 - Cobalt R8

Performance Bulletin


Engine: Yamaha XF425USA2
Boat: Cobalt R8
Configuration: Single
Test Date: 15-Mar-2021
XF425USA2

Performance Data

RPM
MPH
GPH
MPG
1000 5.6 1.9 2.92
1500 7.5 2.8 2.71
2000 9.1 4.3 2.12
2500 11.8 6.6 1.80
3000 14.3 8.5 1.68
3500 21.5 11.0 1.95
4000 31.2 15.0 2.08
4500 36.7 19.2 1.91
5000 41.4 23.7 1.75
5500 46.4 30.5 1.52
6000 51.5 38.6 1.34

0-20 MPH: 6.14 seconds

Notice To Consumer The information and data contained in this Performance Bulletin is approximate and subject to many different factors and variables. It is provided as a guideline only and should not be relied upon as representative of actual performance. Your boat’s performance may be different than the information contained in this Performance Bulletin due to various factors, including your boat’s actual weight, wind and water conditions, temperature, humidity, elevation, bottom paint, boat options affecting wind/water drag and/or boat weight, and operator ability. Please confirm the specifications and performance data on your specific boat/engine combination with your dealer prior to purchase. Please also keep in mind that the data contained in this Performance Bulletin may or may not have been performed using Yamaha PowerMatched components. Yamaha reserves the right to change the specifications and performance data of this Performance Bulletin or engine without notice. This document contains many of Yamaha’s valuable trademarks. It may also contain trademarks belonging to other companies. Any references to other companies or their products are for identification purposes only, and are not intended to be an endorsement.