Evinrude 4906B 4HP 1969 Owner's Manual page 263

8-4 LOWER UNIT
View of a badly corroded lower
to
and was allowed remain over
time causing extensive damage.
Water in the Lower Unit
Water in the lower unit is usually caused
by fish line becoming entangled around the
propeller shaft behind the
damaging the propeller
not removed, it will cut the propeller shaft
seal and allow water to enter the lower unit.
F ish line has also been known to cut a
groove in the propeller shaft.
The propeller should be removed
time the boat is hauled from the water at
the end of an outing and any material
tangled behind the propeller removed before
it can cause expensive damage.
amount of time and effort
pulling the propeller is repaid many times by
reduced maintenance
cluding the replacement
Slippage in the Lower Unit
If the shift seems to be slipping as the
boat moves through the water:
Entangled fish line finally
the propeller. The line cut the seal.
to
allowed water enter
disaster shown in the illustration
column. The propeller should be removed frequently
and debris removed from the rpropelier
such costly repairs.
unit,
liater entered
an
extended period of
propeller and
seal. If the line is
each
en-
The small
involved in
and service work, in-
of expensive parts.
Check the
removed from ahead of
The damaged seal
the lower unit causing the
at the top of this
to
shaft prevent
Cut-a-way view of a
ler, rubber hUb, and metal hub.
propeller and the
propeller has been subjected to many strikes
against underwater
its hub. If the
excessively worn on the small propellers,
is not economical
propeller rebuilt. A new propeller
purchased for considerably
meeting the expense
worn propeller.
Difficult Shifting
Verify that the ignition switch is OFF, or
better still, disconnect the spark plug wires
from the plugs, to prevent possible personal
injury, should the engine start.
unit into REVERSE gear at the shift control
box, and at the same time have an assistant
turn the propeller shaft to ensure the clutch
is fully engaged. If the shift handle is hard
to move, the trouble may be in the lower
unit, with the shift cable, or in the shift
box, if used.
Isolate the problem:
shift cable, if used, at the engine.
the shift lever. If shifting is still hard, the
problem is in the shift cable or control box,
see Chapter 7. If the shifting feels normal
Diagram to illustrate
at
disconnect the engine.
propeller showing the propel-
rubber hub. If the
objects, it could slip on
hub is damaged
to have the hub or
may be
less than
of rebuilding an old
Shift the
Disconnect
Operate
the shift cable hookup quick
or
it
the