Take Time; You May - Evinrude 4906B 4HP 1969 Owner's Manual

8-20 LOWER UNIT
ADVICE
If the only work to be performed
service of the water pump, be extremely
CAREFUL to prevent
being pulled up and free of the pinion gear
in the lower unit.
unit by the driveshaft.
be released from the pinion, the lower unit
MUST be disassembled
gear and the driveshaft,
installed. To install the water pump, pro-
ceed directly to Page 8-31, Water Pump
Installation
LOWER UNIT DISASSEMBLING
GOOD WORDS
One of two type of driveshafts
installed in the lower units covered in this
section. One has a spline on the lower end
of the shaft to index with the splines in the
pinion gear. The other type drlveshaft has
a key and keyway in the lower end of the
driveshaft. The key indexes with a match-
ing keyway in the pinion gear.
5- CAREFULLY
dr iveshaf If the driveshaft
t,
easily, the unit is the type with the splines
on the end of the shaft.
come free, it is the type with the key and
keyway. Therefore,
removed later when
disassembled. If the driveshaft
remove it at this time.
6- Turn the lower unit upside down and
again clamp it in the vise or slide it into the
wooden block, if one is used.
examine the lower portion of the unit. The
cap is considered that part below the split
the driveshaft from
NEVER carry the lower
If the shaft should
to align the pinion
then the driveshaft
may be
pull upward on the
comes free
If the shaft will not
the driveshaft will be
the lower unit
comes free,
Carefull y
is
with the skeg attached.
unit caps are installed on engines covered in
t his section.
installed, and the other does not.
Phillips screw
screw.
7- Remove the attaching
the cap. These screws may be slotted-type
or Phillips screws.
cap to jar it loose, and then separate it from
the lower unit housing.
have a Phillips screw on the outside, observe
the two slots inside the cap.
is

TAKE TIME

Before proceeding
work, take time to study the arrangement
parts in the lower unit.
follow the practice
mechanics and take a polaroid picture of the
unit as an aid during the assembly
Several engineering
Two types of lower
One has a Phillips
is installed, remove
screws around
CAREFULLY
If the cap did not
with the disassembly
You may elect to
of many professional
and production changes
screw
If the
the
tap the
of
work.