DRIVE SHAFT HOUSING
SERVICE MANUAL NUMBER 28
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
1.65:1
1.50:1
1.36:1
U-JOINT SHAFT MARKING
C
F
H
NUMBER OF TEETH PER GEAR - DRIVE SHAFT HOUSING
RATIO
1.65:1
1.50:1
1.36:1
DRIVE
DRIVEN
30
23
27
27
32
29
Bravo Two
U-JOINT IDENTIFICATION
RATIO
2.20:1
2.00:1
1.81:1
1.65:1
U-JOINT SHAFT MARKING
C
F
H
T
INDEX
Page 3A-10
90-863160 MAY 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | MerCruiser Sterndrives 90-863160 |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 3 out of 3)
Marine readers have rated Mercury MerCruiser Bravo Outdrives Sterndrives Marine Engines Service Manual Number 28 3.0 out of 3.0 based on 1 product reviews. I could not find any mention of the seawater pump assembly.
Maybe I have the wrong unit