Gear Housing Installation - Mercury 40 Service Manual

Gear Housing Installation

WARNING
Disconnect (and isolate) spark plug leads before
installing gear housing onto driveshaft housing.
1. Position shift block in forward gear position.
a
a - Shift Block
2. Tilt engine to full "Up" position. Engage tilt lock le-
ver.
3. Shift gear housing into neutral. Propeller shaft
will rotate freely in either direction.
4. Install water tube seal, spacer and shift shaft cou-
pler.
95
a
Loctite "405" (Purchase Locally)
74
95
2-4-C w/Teflon (92-850736A1)
a - Water Tube Seal
b - Spacer
c - Shift Shaft Coupler
90-852572R1 JANUARY 1998
51190
74
c
b
51206
CAUTION
Do not lubricate top of driveshaft. Excess lubri-
cant will not allow driveshaft to fully engage
crankshaft. Tightening the gear housing fasten-
ers (if excess lubricant is on top of driveshaft) will
load the driveshaft/crankshaft and may damage
either or both powerhead and gear housing. Wipe
the top of driveshaft free of lubricant.
5. Lightly apply Quicksilver 2-4-C Marine Lubricant
onto the driveshaft splines.
6. Shift gear housing into forward gear. Gear hous-
ing will not engage when propeller shaft is turned
clockwise.
7. Position driveshaft into driveshaft housing. Move
gear housing towards driveshaft housing while
aligning shift shaft coupler, water tube seal and
driveshaft splines.
NOTE: If the driveshaft splines will not align with the
crankshaft splines, install a propeller and turn the
propeller shaft counterclockwise while pushing gear
housing onto driveshaft housing. It may also be nec-
essary to move the shift block (on the powerhead) to
align the shift shaft splines for proper re-assembly.
8. Install 4 bolts and washers, (two each side). Ap-
ply Loctite 271 on threads of bolts prior to installa-
tion.
9. Install locknut and washer.
10. Torque bolts and locknut to 40 lb. ft. (54 N·m).
b
Loctite "271" (92-809819)
7
a - Bolts and Washers
b - Locknut and Washer
7
a
50551
LOWER UNIT - 6B-33