Evinrude 4906B 4HP 1969 Owner's Manual page 51

3-10 POWERHEAO
Check the reed location over the reed
block, or plate openings to be sure the reed
is centered.
The reed assemblies are then ready for
installation.
Small Engines
Disassemble the reed block by first re-
moving the screws securing the reed stops
and reeds to the reed block, and then lifting
the reed stops and reeds from the block.
Clean the gasket surfaces
block or plate. Check the surfaces for deep
grooves, cracks, or any distortion that could
cause leakage. Replace the reed block or
plate if it is damaged.
After new reeds have been installed, and
the reed stop and attaching
been tightened to the required torque value,
check the new reeds as outlined
following paragraphs.
Check to be sure the reeds are not
preloaded. They should not adhere to the
block or plate, and still the clearance
tween the reed and the block surface, should
not be more than 0.010" (0.254 mrn).
NOT remove the reeds, unless they are to be
replaced. AL WAYS replace reeds in sets.
NEVER turn used reeds over to be used a
second time.
Lay the reeds on a flat
measure all the reed stops.
great difference between the stops, the en-
tire reed stop assembly should be replaced.
Any attempt to bend and get all the stops
equal and level would be almost impossible.
Close view showing the dimple
The reed leaves must
centered over the openings for proper operation.
of the reed
screws have
in the
surface
If there is a
on the reed plate.
straddle the dimple and
a
Using
between the reed tip and the reed plate.
INSTALLATION
Procedures
power head will be found in Section
Cylinder
Installation.
3-6 BYPASS
be-
On some small horsepower
DO powerhead does not contain bypass covers.
The bypass covers the area the fuel travels
from the crankcase
powerhead and into the cylinder.
Seldom does a bypass cover cause any
and
problem.
pump may be attached
covers.
be Removing
head.
to
feeler gauge measure
to install the reeds to the
Block Service, under Reed Box
COVERS
up the
On some model engines, a fuel
to one of the bypass
the intake cover from
the clearance
3-15,
engines the
side of the
a
typical power-