Filling
the inside of the piston
to
protect
the skirt
from
being
struck
by
the
rod
before
the
piston
is
i'!stalled
in the cylinder
block.
INSTALLATION
Piston
and rod assembly installation
pro-
cedures will be found in Section
3-15, Cylin-
der Block Service under Piston Installation
3-14
CRANKSHAFT
REMOVAL
Lift
the
crankshaft
assembly
from
the
block.
On some
models,
especially
the
larger
horsepower
engines,
it may be neces-
sary to use a soft-headed
mallet
and tap on
the bottom
side of the
crankshaft
to jar it
loose.
As the
crankshaft
is lifted,
TAKE
CARE
to
work
the
center
main
bearing
loose.
This center
bearing
is a split bearing
held
together
with
a snap wire
ring.
On
some models, the bottom
half of the bearing
may be stuck in the cylinder
block.
There-
fore,
the
crankshaft
and the
center
main
bearing
must
be worked
free
of the
block
together.
If servicing
a
15 hp to
40 hp engine,
observe
how the
center
main
bearing,
and
the top and bottom
main bearings
all have a
hole in the
outside
circumference.
Notice
Crankshaft
with
the upper,
center,
and lower
main
bearings ready
to
be removed.
CRANKSHAFT
3-27
Crankcase
cover with
the labyrinth
seal area clearly
visible.
the locating
pins in the cylinder
block.
The
purpose
of this
arrangement
is to prevent
the
bearing
shell
from
rotating.
During
assembling,
the holes in the bearings
MUST
index with the pins in the block.
Also notice
the grooves
in the block on one side of the
center
main bearing.
Observe
the grooves
in the
crankcase
cover.
This arrangement
of grooves
forms
what
is commonly
known
as a "labyrinth"
seal.
The grooves
fill with
oil and/or
fuel creating
a seal between
the
cylinders.
On the sm aller horsepower
engines,
bab-
bitt
bearings
are
used for the center
main
with needle
bearings
installed
for the upper
and lower main bearings.
CLEANING
AND
INSPECTION
Inspect
the splines
for signs of abnormal
wear.
Check
the
crankshaft
for
straight-
ness.
Inspect
the
crankshaft
oil seal sur-
faces to be sure they are not grooved,
pitted
or scratched.
Replace
the crankshaft
if it is
severely
damaged or worn.
Check all crank-
shaft
bearing
surfaces
for
rust,
water
Badly
rusted
and
corroded
crankshaft
from
a
sub-
merged
engine.
This· crankshaft
is
no
longer
fit
for
service.
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...