Evinrude 4906B 4HP 1969, Owner'S Manual

Page: 123 / 422

4-32 FUEL
GOOD
WORN
GOOD
WORN
Cross-section drmving
to
allow comparison
of a
new
needle and seat (left), with one badly worn (right).
Comparison of a worn and new needle valve. The
top needle is unfit
for
further service.
If a high-speed orifice is installed on the
carburetor being serviced, check the orifice
for cleanliness. The orifice has a stamped
burrs which might cause a leak. Check the
float for deterioration. Check to be sure
the float spring has not been stretched. If
any part of the float is damaged, the unit
must be replaced. Check the float arm
needle contacting surface and replace the
float if this surface has a groove worn in it.
Inspect the tapered section of the idle
and high-speed adjusting needles and replace
any that have developed a groove.
ELECTRIC CHOKE
ASSEMBLY
Exploded view
of a
Type II carburetor installed on larger horsepower engines equipped with the all-electric choke.