Evinrude 4906B 4HP 1969 Owner's Manual page 270

CLEANING AND INSPECTING
Clean all water pump parts with solvent,
and then dry them
Inspect the water pump cover and base for
cracks and distortion,
overheating. Inspect
water pump insert for grooves and/or rough
surfaces. If possible,
complete new water pump while the lower
unit is disassembled.
ensure extended satisfactory
give "peace of mind" to the owner.
old impeller must be returned
NEVER install it in reverse to the original
direction of rotation.
will cause premature
Inspect the impeller
and the ends of the
cracks, tears, and wear.
or melted appearance,
ing without sufficient
tion exists, and as previously stated,
a new impeller if at all possible.
Clean all parts
them with compressed air.
rings and gaskets.
driveshaft if the splines are worn.
Exploded drawing
with compressed
possibly caused from
the face plate
AL WAYS install
A new impeller
service
If the
to service,
Installation in reverse
impeller failure.
side seal surfaces
impeller blades
Check for a glazed
caused from operat-
water. If any ques-
install
with solvent and dry
DISCARD all 0-
Inspect and replace the
Inspect
of
the non-shifting
air.
and
a
will
and
Propeller
power lower
cleaned and inspected.
for
the gearcase
age to the machined surfaces.
nicks and refurbish the surfaces on a surface
plate. Start
and finish with No. 180.
Check the water intake screen and pas-
sages. Inspect the drive gear, pinion gear,
and thrust washers.
they appear worn. If any of the surfaces are
lower unit, with major parts identified.
SERVICE NO SHIFT
shaft and gear removal from
unit. All parts should
and exhaust housing for dam-
with a No. 120 Emery paper
Replace these items if
8-1 I
a
low horse-
be thoroughly
Remove any