Mercury 75 Service Manual page 479

6. Assemble Pinion Gear Locating Tool (91-12349A2)
as shown; do not tighten collar retaining bolt at
this time.
b
c
a c
a - Arbor
b - Gauging Block; Install With Numbers Away From Split
Collar
c - Bolt; Gauging Block Retaining
d - Split Collar
e - Bolt; Collar Retaining
f - Snap Ring
7. Insert tool into forward gear assembly; position
gauging block under pinion gear as shown.
a - Gauging Block
8. Remove tool, taking care not to change gauging
block position, and tighten collar retaining bolt.
90-830234R3 DECEMBER 1997
d
e
f
a
22067
9. Insert tool into forward gear assembly; position
proper numbered flat (from chart) of gauging
block – under pinion gear.
(PINION GEAR TEETH/
REVERSE GEAR TEETH)
MODEL
50 Bigfoot (4-stroke)
60 Bigfoot/60 Sea-
pro/60 Marathon
75-thru-90
(3 Cylinder)
100/115/125
(4 Cylinder)
10. Install the number "3" locating disc against bear-
ing carrier shoulder in gear housing.
11. Position access hole as shown.
b
a
a - Locating Disc
b - Access Hole
GEAR RATIO USE
FLAT
NO.
13/30 8
13/30 8
13/30 8
14/29 2
24643
LOWER UNIT - 6A-27