3-12
POWERHEAD
On powerheads
equipped with the heat/-
electric
choke, a baffle
is
installed
on the
inside
surface
of
the
inner
plate.
This
baffle
is
heated
from
the
engine
exhaust
gases.
Air passing through the baffle
heats
the
choke and allows the
choke to open as
engine temperature
rises.
CLEANING
Clean any gasket
material
from the cov-
er and inner
plate
surfaces.
Check
to be
sure
the
water
passages
in the
cover
and
plate
are clean
to permit
adequate
passage
of cooling water.
Inspect
the inlet
and outlet
hole in the
power head
to be sure
they
are
clean
and
free
of
corrosion.
The
openings
in
the
powerhead
may be cleaned
with a small size
screwdriver.
Clean the area around the exhaust
ports
and in the
webs running
up to the
exhaust
ports.
Carbon has a habit of forming in this
area.
INST ALLA TION
Procedures
to install
the exhaust
covers
will
be found in Section 3-15, Cylinder
Block
Service,
under
Bypass
Cover
and Exhaust
Cover Installation.
The exhaust area of the powerhead,
open for inspec-
tion and cleaning.
3-8
TOP
SEAL
The top seal maintains
vacuum and pres-
sure in the crankcase
at the top cylinder.
REMOVAL
This seal can only be removed
using one
of two methods.
The
first,
is by using a special
puller
while the power head is still
assembled.
If
the
puller
is used,
thread
the
end of the
puller
into
the
seal.
After
the
puller
is
secured
to the seal,
remove
the seal
from
the
power head
by
tightening
the
center
screw
on the
puller.
DO NOT
attempt
to
use any other
type
of tool to remove
this
seal or the power head flanges
will be dam-
aged.
If the flanges are damaged,
the block
must be replaced.
The second method is to remove the seal
during powerhead
disassembling.
After
the
crankcase
cover has been removed,
the seal
will be loose and can be easily
removed
by
holding onto the bearing and prying the seal
out.
INST ALLA TION
To install
the
seal
with the
power head
assembled,
coat the outside
diameter
of the
Using the
proper
tools
to
remove
the top seal.
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...