Evinrude 4906B 4HP 1969 Owner's Manual page 61

3-20 POWERHEAD
TAKE CARE not to lose any of the bearings
when the wrist pin is driven free
piston.
Alternate Removal Method
If the piston does not have the "L" or the
word LOOSE stamped, the wrist pin may be
driven out in either direction.
If an arbor press or cradle is not avail-
able, proceed as follows:
a container of very hot water for about ten
minutes. Heating the piston will cause the
metal to expand ever so slightly,
the task of driving the pin out.
sitting position in a chair, on a box, what-
ever. Next, lay a couple towels over your
legs. Hold your legs tightly
form a cradle for the
knees. Set the piston
with the LOOSE side of the piston facing
upward. Now, drive the wrist pin free using
a drift pin with a shoulder.
will fit into the hole through the wrist pin
and the shoulder will ride on the edge of the
wrist pin. Use sharp
hammer. Your legs will absorb the shock
without damaging the piston.
is used on a regular
season, your legs will develop
blue areas, but no problem, the marks will
disappear in a few days.
Removing the wrist pin using
of the
Heat the piston in
but ease
Assume a
together to
piston above your
between your legs
The drift pin
hard blows with a
If this method
basis during the busy
black-and-
a
holding block.
Removing the wrist pin using
can be supported between your legs as described in the
text.
Rod, rod cap, wrist pin, and wrist pin bearing, after
removal.
at
Testing two rods the wrist pin end for warpage.
at
Testing two rods the rod cap end for warpage.
a
drift pin. The piston