Evinrude 4906B 4HP 1969 Owner's Manual page 39

2-14
TUNING
Considerable amount
the propeller shaft. Some of the fish
melted, giving it the appearance of
Remove the cotter
shear pin, and the propeller from the shaft.
Check the propeller shaft seal to be sure it
is not leaking. Check the area just forward
of the seal to be sure a fish line is not
wrapped around the shaft.
Operation At Recommended RPM
Check with the local OMC dealer, or a
propeller shop for the recommended
and pitch for a particular
Ski rope entangled around the propeller
of the rope has actually melted
this case, the rope cut through the lower unit oil seal,
allowing lubricant to escape.
ENTANGLED
F SH LINE
of fish line entangled around
line actually
a washer.
key, propeller nut,
size
size engine, boat,
shaft. Some
and fused together.
and intended operation.
ler should be installed
enable operation at recommended rpm.
Two rpm ranges are usually given.
lower rpm is recommended
slow boats, or for commercial
The higher rpm is recommended
fast boats.
in greater satisfaction
performance
the engine speed is above the recommended
rpm, try a higher pitch propeller
same pitch
explanation
eter, cupped, etc.
For a dual engine installation,
higher pitch propeller
satisfactory
2-14 LOWER UNIT
NEVER remove the vent or filler plugs
when the lower unit is hot.
cant would be released
hole. Check the lubricant
unit has been allowed to cool.
OMC approved gear lubricant.
regular automotive-type
unit, because
New propeller
horsepower engines,
excessive vibration,
sive parts. The modest cost of
therefore justified.
In
economical when balanced against the minor difference
of purchasing a new
The correct propel-
on the engine to
for large, heavy
applications.
The wide rpm range will result
because of maximum
and greater fuel economy.
cupped. See Chapter
of propeller terms, pitch, diam-
may prove the most
condition for water skiing.
Expanded lubri-
through
level after
grease in the lower
it expands and foams
ready for installation.
a
damaged propeller
resulting in failure of more expen-
a new propeller
Rebuilding a small propeller
unit.
The
for light,
If
or the
1 for
the next
the plug
the
Add only
NEVER use
too
On the smaller
can cause
~
is
is not