Mercury 75 Service Manual page 487

2. Tilt engine to full "UP" position and engage tilt
lock lever.
3. Shift gear housing into neutral position. Propeller
shaft will rotate freely in either direction.
4. Install water tube seal; lube I.D. of seal with
Quicksilver 2-4-C w/Teflon (92-825407A12).
5. Apply a bead of RTV Sealer as shown.
95
a
78
b
G. E. RTV Sealant (92-90113--2)
78
95
2-4-C With Teflon (92-825407A12)
a - Water Tube Seal
b - RTV Sealer
CAUTION
Do not use lubricant on top of drive shaft. Excess
lubricant, that is trapped in clearance space, will
not allow drive shaft to fully engage with crank-
shaft. Subsequently, tightening the gear housing
fasteners (while lubricant is on top of drive shaft)
will load the drive shaft/crankshaft and damage
either or both the power head and gear housing.
Top of drive shaft is to be wiped free of lubricant.
6. Apply a light coat of Quicksilver 2-4-C w/Teflon
onto drive shaft splines.
7. Apply a light coat of Quicksilver 2-4-C w/Teflon on
gear case shift shaft splines and upper shift shaft
splines. Do not use lubricant on ends of shift
shafts.
90-830234R3 DECEMBER 1997
8. Install components as shown in appropriate
photo.
POWER TRIM MODELS
53938
a - Nylon Spacer
b - Shift Shaft Coupler; Used on Models Equipped with
Power Trim
c - Bushing 40/45/50 Bigfoot (4-Stroke) Only
NON-POWER TRIM MODELS
b
a
a - Nylon Spacer
b - Shift Shaft Coupler; Used on Models NOT Equipped with
Power Trim
c - Flat; MUST BE Positioned Toward Front of Gear Housing
9. Shift gear housing into forward gear position. In
forward gear the gear housing will ratchet when
propeller shaft is turned clockwise and resistance
will be felt when propeller shaft is rotated counter-
clockwise.
c
b
a
53968
c
53925
LOWER UNIT - 6A-35