Evinrude 4906B 4HP 1969 Owner's Manual page 261

8-2 LOWER UNIT
except for the type of bearings installed and
therefore slightly
procedures.
The fourth type
Section 8-8, are
electric shift.
Water pump service
most common reason
lower unit. Each lower unit service section
contains complete
rebuild the water pump.
given to prepare for the water pump work
must be performed as listed.
the pump is ready for installation,
other work is to be performed
unit, the reader may jump to the pump
assembling procedures
stallation of the water pump.
Each section is presented
detailed instructions
sembly, cleaning and inspecting,
adjusting, and installation
unit.
ILLUSTRATIONS
Because this chapter
range of models over an extended period of
time, the illustrations
procedural steps are those of the most
ular lower units.
being serviced may not appear to be identi-
cal with the unit illustrated.
step-by-step work sequence
all cases. If there is a special procedure for
a unique lower unit, the differences
clearly indicated in the step.
SPECIAL WORDS
All threaded parts are right-hand
otherwise indicated.
If there is any water in the lower unit or
metal particles are discovered
lubricant, the lower
pletely disassembled,
Gear arrangement used
lower unit.
different assembling
units, presented
the lower units
work is by far the
for removal of the
detailed procedures
The instructions
However, once
if no
on the lower
and proceed with in-
with complete
for removal, disas-
assembling,
of only one type
covers such a wide
included with the
In some cases, the unit
However, the
will be valid in
will be
unless
in the gear
unit should be com-
cleaned and inspected.
the manual Shift
on
40 hp
in
with
to
Gear arrangement used
shift lower unit.
Actually, problems in the lower unit can
be classified into three broad areas.
1- Lack of proper lubrication
er unit. Most often, this is caused by failure
of the operator
frequently
ed.
2- Water
through
remain in the lower unit over a period of
non-use time will separate
can be destructive.
pop-
3- Excessive clutch dog and clutch ear
wear on the forward and reverse gears.
condition is caused by excessive wear in the
bellcrank
bellcrank will result in sloppy shifting of the
lower unit and cause the clutch components
to wear and develop shifting problems.
proper shifting
will also result
clutch dog and dutch
and reverse gears.
8-2 TROUBLESHOOTING
MANUAL
Troubleshooting
the unit is removed from the powerhead
permit isolating
Always attempt
shooting in an orderly manner.
approach
incorrect
cessary parts, and frustration.
The following
in a logical sequence
lent, easiest,
checked
the
on
to check the gear oil level
and to add lubricant when requir-
entering the
a faulty seal. Water
from the oil and
under the power head.
techniques at the shift box
in excessive
ears of the forward
SHIFT
MUST be done BEFORE
the problem to one area.
to proceed
will only result in wasted
diagnosis, replacement
procedures
with the most preva-
and less costly items
listed first.
electromatic
40 hp
in the
10\v-
lower unit
allowed to
This
A worn
Im-
wear to the
to
with trouble-
The shotgun
time,
of unnec-
are presented ~
to be