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Performance Bulletin


Engine: Yamaha F250XSB / LF250XSB
Boat: Cobia 285 CC
Configuration: Twin
Test Date: 28-Apr-2026
Cobia® - Cobia 285 CC

Performance Bulletin

58 - Cobia 285 CC

Cobia 285 CC

Length 28' 5"
Beam 9' 11"
Dry Weight (Boat Mfr. Pub) 6,028 lbs
Maximum HP 700 hp
Fuel Capacity 231 gal
Weight as Tested 8,400 lbs

F250XSB / LF250XSB

Horsepower 250 hp
Induction EFI/VCT/DOHC
Displacement 4.2L
Weight (Estimated) 611 lbs
Gear Ratio 1.75:1

Engine Mounting Height

Mounting Hole Position #2

Propeller(s)

Series Saltwater Series II HP
Diameter x Pitch 15-1/4 x 18
Yamaha Part # 6KB-45970-00-00 / 6KA-45970-00-00
Propeller Material Stainless Steel

Test Conditions

Number of People 2
Air / Water Temperature (Fahrenheit) 83° F / 79° F
Elevation (in feet above sea level) 0'
Wind Velocity 0-10 MPH

Comments

Test weight includes 145 gallons of fuel, 4 batteries, safety and test equipment.

YPB#: PB_COB_285 CC_TW_F250XSB_4-28-26_OCC

Cobia® - Cobia 285 CC

Performance Bulletin


Engine: Yamaha F250XSB / LF250XSB
Boat: Cobia 285 CC
Configuration: Twin
Test Date: 28-Apr-2026
F250XSB / LF250XSB

Performance Data

RPM
MPH
GPH
MPG
1000 5.7 2.6 2.22
1500 8.1 4.3 1.87
2000 10.0 7.4 1.35
2500 16.9 10.1 1.68
3000 24.7 12.3 2.00
3500 30.7 16.1 1.91
4000 37.1 22.4 1.66
4500 42.6 27.8 1.53
5000 47.5 36.3 1.31
5500 52.4 46.0 1.14
6000 54.8 49.3 1.11

0-20 MPH: 4.72 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.