Basic Tools Required
Below is a list of some
basic tools required to disassemble a MerCruiser outdrive. Additional tools
are available for removing/installing bearings, seals and shimming the gears.
1968 - 1983
Pre-Alpha Drives
Upper
spanner wrench to remove the 3 7/8 inch
retainer nut behind the u-joints.
Drive
shaft adaptor tool for turning
the lower vertical drive shaft to remove the pinion nut. A 7/8 open end wrench
can be use to hold the nut on the bottom.
Shift
shaft bushing tool used to
remove the shift shaft bushing in the lower unit.
Lower
bearing carrier retainer nut tool. This is
used to unscrew the 4 3/8 carrier nut located in the lower unit behind the
propeller.
1984 - 1991
Alpha One Drives
Upper
spanner wrench to remove the 3 7/8 inch
retainer nut behind the u-joints.
Drive
shaft adaptor tool for turning
the lower vertical drive shaft to remove the pinion nut. A 7/8 open end wrench
can be use to hold the nut on the bottom.
Shift
shaft bushing tool used to
remove the shift shaft bushing in the lower unit.
Wrench
to remove the 2 5/16 retainer nut below
the water pump on 1984 - Date.
Lower
bearing carrier retainer nut tool. This is
used to unscrew the 4 3/8 carrier nut located in the lower unit behind the
propeller
1992 - Date
Alpha One Generation II Drives
Upper
spanner wrench to remove the 3 7/8 inch
retainer nut behind the u-joints.
Drive
shaft adaptor tool for turning
the lower vertical drive shaft to remove the pinion nut. A 7/8 open end wrench
can be use to hold the nut on the bottom.
Wrench
to remove the 2 5/16 retainer nut below
the water pump on 1984 - Date.
Lower
bearing carrier retainer nut tool. This is
used to unscrew the 4 3/8 carrier nut located in the lower unit behind the
propeller
1988 - Date
Bravo Drives
Upper
spanner wrench to remove the 4 inch
retainer nut behind the u-joints.
Drive
shaft adaptor tool for turning
the lower vertical drive shaft to remove the pinion nut on Bravo 1 & 2
drives. An open end wrench
can be use to hold the nut on the bottom.
Lower
bearing carrier retainer nut tools. These tools are
used to unscrew the carrier nut located in the lower unit behind the
propeller on Bravo 1, Bravo XR and Bravo 2
drives.
Bravo 3 prop
wrench is used on the larger ( 2 3/4 ) nut which holds the first prop.
1973 - 1993 TR
& TRS Drives
Upper bearing
holder for removing and installing the universal joint nut.
This
is a drive shaft adaptor kit. It is
used to provide a wrench surface to turn the vertical drive
shafts located in both the upper and lower housings on TR & TRS outdrives.
The
T-Handle wrench is used to turn the serrated nut in the upper housing while
setting the bearing pre-load on the vertical upper drive shaft.
Lower
bearing carrier retainer nut tool. This is
used to unscrew the 4 3/8 carrier nut located in the lower unit behind the
propeller on TRS drives and the 5 1/8 carrier nut on TR drives.
MerCstuff,
llc 
