Evinrude 4906B 4HP 1969 Owner's Manual page 40

much. Outboard lower units do not have
provisions to accommodate
If the lubricant
indicating the presence
should be made to determine how the water
entered. If large amounts of lubricant must
be added to bring the lubricant up to the full
mark, a thorough inspection should be made
to find the cause of the lubricant loss.
Draining Lower Unit
The fill/drain plug on Johnson/Evinrude
lower units may be located
bottom of the unit on the port side, star-
board side, or on the leading edge of the
lower unit. On many models a Phillips
screw will be found very close to the fill/
drain plug. NEVER
screw because the lower unit would then
have to be disassembled
the cradle for the shift dog back in place.
Remove the drain plug and then remove
the vent plug located just above the anti-
cavitation plate.
Filling Lower Unit
Position the drive
vertical and without a list to either port or
starboard. Insert the lubricant tube into the
FILL/DRAIN hole at the bottom
DRAIN ING
GEAR Oil
The gear oil in the lower unit should
daily
basis during the season
should be drained and replenished
of
100 hours operation.
such expansion.
appears milky brown,
of water, a check
towards the
remove this Phillips
in order to return
unit approximately
plug hole,
be checked on a
of
operation. The oil
with new oil every
and inject lubricant
to come out the VENT hole.
VENT plug first then replace the
with NEW gaskets.
gaskets are properly positioned
water from entering
times some of the gear lubricant
during installation of the plugs.
if the vent plug is removed again, and more
lubricant added very SLOWLY using a small-
spout oil can to allow air to pass out the
opening, there is no doubt but what the unit
will be filled to capacity.
For detailed lower unit service
dures, see Chapter
lubr ication capacities,
Repairs and Adjustments
For detailed procedures
clean, assemble, and adjust the
see the appropriate
the carburetor type on the engine
serviced.
2-15 BOAT TESTING
Hook and Rocker
Before testing the boat, check the boat
Filling the lower unit with new gear oil.
unit is filled through the lower plug, but the upper plug
MUST be removed to allow trapped air
BOAT TESTING
until the excess begins
Install
FILL plug
Check to be sure the
to prevent
the housing. Many
is lost
Therefore,
proce-
8. For lower unit
see the Appendix.
to disassemble,
carburetor,
section in Chapter 4 for
being
Notice the
to escape.
2-15
the