seal
with
OMC Seal
Compound.
Use the
special
tool
to tap
the
seal
EVENLY
into
place around the crankshaft.
If the power head has been disassembled,
a socket
or other
similar
type tool of equal
diameter
as the seal may be used to tap it
into
the
bearing.
If the
powerhead
being
serviced
does not have the seal in the bear-
ing, lay the seal in the recess
of the block.
When the
crankcase
cover
is installed,
the
seal will be in place.
3-9
BOTTOM
SEAL
The bottom
seal has equal importance
as
the
top
seal.
This
seal
is
installed
to
maintain
vacuum
and pressure
in the lower
half of the crankcase
for the lower cylinder.
The bottom
seal will vary,
depending
on
the
model
engine
being serviced.
The fol-
lowing procedures
and accompanying
i
llus-
trations
cover
the
most
common
Johnson/-
Evinrude bottom
seal installed.
Seal Mounted on the Driveshaft
When the power head is removed,
observe
around the driveshaft
at the lower end, and
the seal will be visible.
The seal consists
of
a
gasket,
plate,
an
O-ring,
lower
seal
bearing,
spring,
washer,
and a pin.
The pin
Using the proper tools
to
install
the top seal.
BOTTOM
SEAL
3-13
is installed
through
the dr iveshaft
and holds
the seal upward and in place.
As the
powerhead
is lowered
down over
the driveshaft
during installation,
the seal is
held in place
and will hold the vacuum
and
pressure
created
when the engine
is operat-
ing.
Removal
With
the
powerhead
assembled,
it is a
simple
matter
to
reach
into
the
exhaust
housing
and remove
the
seal
and then
re-
place
the
gasket
and O-ring.
Check
the
spring, to be sure it is not distorted,
and the
washer for damage.
Seal Mounted on the Crankshaft
This bottom
seal prevents
exhaust
fumes
from entering
the crankcase,
and holds pres-
sure and vacuum inside.
The seal consists
of
a
quadrant
ring,
O-ring,
retainer
washer,
spring, another
washer,
and a snap ring.
Removal
To remove
this seal from the lower end
of the
crankshaft,
use
a
pair
of
Tru-arc
pliers
and
CAREFULLY
remove
the
snap
ring.
TAKE
CARE
not to lose any of the
parts
due to the spring pressure
against
the
snap ring.
Notice
how the
quadrant
O-ring
fits inside the seal.
This ring is also remov-
able.
Observe
how the
seal
has
a raised
edge
on one side.
This raised
edge
MUST
face upward when the seal is installed.
Powerhead lower seal installed
on
the driveshaft.
Содержание 4906B 4HP 1969
Страница 5: ......
Страница 85: ...3 44 POWERHEAD EXHAUST COVER I LEVER Exploded drawing of a 5 5 hp powerhead 1956 60 principle parts identified...
Страница 87: ...3 46 POWERHEAD Exploded drawing of a 7 5 hp powerhead 1956 58 with principle parts identified...
Страница 88: ...CYLINDER BLOCK 3 47 HEAD GASKET RING...
Страница 89: ...3 48 POWERHEAD HEAD BYPASS COVER Exploded drawing of a 10 hp powerhead 1956 63 with principle parts identified...
Страница 90: ...CYLINDER BLOCK 3 49 THERMOSTAT EXHAUST COVER The...
Страница 137: ...4 46 FUEL LEVER AND LOW SPEED...
Страница 153: ...4 62 FUEL Exploded view of a pressure tyoe fuel tank with major parts identified...
Страница 157: ...4 66 fUEL...
Страница 177: ...5 18 IGNITION FLYWHEEL Exploded drawing of a typical magneto system Only one coil and set of points is shown...
Страница 271: ...8 12 LOWER UNIT PROPELLER Exploded drawing of the Weedless lower unit gear case with major parts identified...
Страница 285: ...8 26 LOWER UNIT Exploded drawing of a lower unit with a window for access to the shift connector...
Страница 412: ...A 16 APPENDIX Wire Identification 33 hp with Generator 1965 67...
Страница 413: ...APPENDIX A 17 o C...
Страница 414: ...Wire Identification 33 hp with Generator 1969 70...
Страница 415: ...APPENDIX A 19 Wire Identification 35 hp 1957 59...
Страница 416: ...A 20 APPENDIX Wire Identification 40 hp Standard Shift with Generator 1960 66...
Страница 417: ...APPENDIX A 21 UJ cc b Wire Identification 40 hp Standard Shift with Generator 1967 68...
Страница 418: ...A 22 APPENDIX ee I U Vl Z Z o U I I Wire Identification 40 hp Standard Shift With Generator 1969 10...
Страница 419: ...APPENDIX Wire Identification 40 hp Electric Shift with Generator 1961 66 A 23...
Страница 420: ...A 24 APPENDIX C 00 Wire Identification 40 hp Electric Shift with Generator 1967 68...
Страница 421: ...Wire Identification 40 hp Electric Shift with Generator 1969 70...
Страница 422: ...NOTES NUMBERS...