Evinrude 4906B 4HP 1969, Owner'S Manual

Page: 301 / 422

8-42
LOWER UNIT
Eabbitt bearing unfit for further service. This type
bearing must not show any signs
of
wear.
Inspect the impeller side seal surfaces
and the ends of the impeller blades for
cracks, tears, and wear. Check for a glazed
or melted appearance, caused from operat-
ing without sufficient water. If any ques-
tion exists, and as previously stated, install
a new impeller if at all possible.
Clean all parts with solvent and dry
them with compressed air. DISCARD all 0-
rings and gaskets. Inspect and replace the
driveshaft if the splines are worn. Inspect
the gearcase and exhaust housing for dam-
age
1'0
the machined surfaces. Remove any
nicks and refurbish the surfaces on a surface
plate. Start with a. No. 120 Emery paper
and finish with No. 180.
Caged ball bearing set destroyed due
to
lack
of
lubrication, vibration, corrosion, metal particles, or all
of
the above.
View
of a
badly corroded lower unit. Water entered
and was allowed
to
remain over an extended period
of
time causing extensive damage.
Badly worn pinion gear. The teeth
of
all gears must
be
coreiuu»
inspected for wear and damage.
A rusted and corroded gear. Water was allowed to
enter the lower unit through
a
bad seal and cause this
damage
to
the gear and other expensive parts.