"Some times the serial #,s And
"Some times the serial #,s And gear ratios numbers are stamped in behind the stickers.
[Bravo indentification to see what gear ratios came stock]
If the drive is off the boat, You could look at the universal joint splined yoke. It will
be identified with a letter such as an XR drive(all ratios) will have the letter "R" stamped on it, or a 1.5:1 XZ drive will have a "Z" stamed on it, And the 1.36:1 drive will have a "T" on it, stock bravo are as follows "C" for 1.65,"F" for 1.50 and "H" for 1.36. And for detailed info here is what is in the service manual.
DRIVE SHAFT HOUSING
Drive Shaft Housing and Gear Case Separation
Drive Unit Gear Ratio Identification
All drive unit gear ratios are identified on each drive in two places. It is important to note the
ratio of the drive unit before proceeding with any repairs. The first place to look is on the
decal on the port side of the drive housing. It will have a number such as (1.50R) and then
the seal number. The second place to look will be on the universal joint splined yoke. It will
be identified with a letter such as (F). This method is explained in the following chart. This
will be true for new or un-tampered with drive units. A drive unit could have had the gear ratio
changed for high altitude, which would void out any application of the following charts. The
gear ratio then would have to be determined by counting the teeth on the drive gear and the
driven gear in the drive shaft housing and using the following charts for reference.
Bravo One
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
1.65:1 C
1.50:1 F
1.36:1 H
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
1.65:1 23 30
1.50:1 27 32
1.36:1 27 29
Bravo Two
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
2.20:1 C
2.00:1 F
1.81:1 H
1.65:1 T
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
2.20:1 23 30
2.00:1 27 32
1.81:1 27 29
1.65:1 27 32
1.50:1 27 29
Bravo Three
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
2.43:1 N
2.20:1 K
2.00:1 B
1.81:1 G
1.65:1 C
1.50:1 F
1.36:1 P
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
2.43:1 23 30
2.20:1 23 30
2.00:1 27 32
1.81:1 27 29
1.65:1 27 32
1.50:1 27 32
1.36:1 27 29
Bravo XZ
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
1.50:1 Z
1.36:1 T
DRIVE SHAFT HOUSING
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
1.50:1 27 32
1.36:1 27 29
Bravo XR
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
1.50:1 R
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
1.50:1 16 19
Diesel Bravo One X
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
1.65:1 C
1.50:1 F
1.36:1 H
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
1.65:1 23 30
1.50:1 27 32
1.36:1 27 29
Diesel Bravo Two X
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
2.20:1 C
2.00:1 F
1.81:1 H
1.65:1 T
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
2.20:1 23 30
2.00:1 27 32
1.81:1 27 29
1.65:1 27 32
1.50:1 27 29
Diesel Bravo Three X
U-JOINT IDENTIFICATION
RATIO U-JOINT SHAFT MARKING
2.43:1 N
2.20:1 K
2.00:1 B
1.81:1 G
1.65:1 C
1.50:1 F
1.36:1 P
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO DRIVE DRIVEN
2.43:1 23 30
2.20:1 23 30
2.00:1 27 32
1.81:1 27 29
1.65:1 27 32
http://www.mtboats.com/outdrivegearratios.html"
