Evinrude 4906B 4HP 1969 Owner's Manual page 278

UNIT
LOWER REMOVAL
1- After the shift rod has been discon-
nected, as described
graphs, remove the bolts securing the lower
unit to the housing. Some units may have an
additional bolt on each side and one at the
rear of the engine.
loose from the exhaust
uncommon for the water tube to be stuck in
the water pump making separation
lower unit from the exhaust
cul t. However, with patience
ence, the tube will come free of the pump
and the lower unit separated
haust housing.
MORE GOOD WORDS
Position the lower
position on the edge of the
resting on the cavitation
lower unit in this position with a C-clamp.
The lower unit will then be held firmly in a
favorable position for further
An alternate method is to cut a groove in a
short piece of 2 x 6" wood to accommodate
11
the lower unit with the cavitation
resting on top of the wood. Clamp the wood
in a vise and service
performed with the lower unit erect
normal position), or inverted
In both positions, the cavitation
supporting surface.
in the previous para-
Work the lower unit
housing. It is not
of the
housing diffi-
and persist-
from the ex-
unit in a vertical
work bench
plate. Secure the
service work.
plate
work may then be
On
(upside down).
plate is the
MANUAL SHIFT 5 HP TO 25 HP
2- Remove the O-ring from the top of
the driveshaft.
installed in this location,
ring. In this case, remove the pin from the
dr iveshaf
t,
parts will have
housing.
WATER PUMP REMOVAL
3- Remove
water pump to the lower unit housing.
very possible corrosion will cause the screw
its heads to break-off
move them is made.
use a chisel and breakaway
housing from the lower
CARE not to damage the lower unit housing.
4- After the screws have been removed,
slide the water pump, impeller, the impeller
key, and the lower water pump plate upward
and free of the driveshaft.
Some units may have a pin
instead of an 0-
The washer, springs, and other
remained in the
the screws securing
when an attemept
If this should happen,
the water pump
unit.
8-19
exhaust
the
It is
to re-
EXERCISE