Evinrude 4906B 4HP 1969 Owner's Manual page 122

A worn needle valve unfit for further
CLEANING AND INSPECTING
NEVER dip rubber parts, plastic parts,
diaphragms, or pump plungers in carburetor
cleaner. These parts
ONLY in solvent, and then blown dry with
compressed air.
Place all metal parts in a screen-type
tray and dip them
until they appear
blow them dry with compressed air.
Blowout all passages
with compressed air. Check all of the parts
service.
should be cleaned
in carburetor cleaner
completely dean, then
in the castings
TYPE II CARBURETOR
Compare this new needle valve with the
to
the left.
and passages to be sure they are not dogged
or contain any deposits.
of wire or any type of pointed instrument to
dean drilled passages or calibrated
a carburetor.
the throttle
fviove
to check for wear.
be too loose, replace the complete throttle
body because individual replacement
are NOT available.
Inspect the main body, airhor n, and ven-
turi duster gasket surfaces for cracks and
4-31
GOOD
worn needle
NEVER use a piece
holes in
shaft back-and-forth
If the shaft appears to
parts