Service manual

FUEL/ CARBURATOR
Carburetor Inspection
1. Inspect jet needle and needle jet for wear. Look for
discoloration, shiny spots, or an area that looks different
than the rest of the needle. The middle to upper portion of
the needle contacts the needle jet and is the most likely
wear point. If jet needle shows signs of wear replace both
the needle and needle jet to prevent a rich condition.
TIP: A worn needle jet is difficult to spot. To check, slide a
slightly larger new jet needle into the needle jet and hold
it to a light source. Light will be visible between the
needle and needle jet if it is worn.
2. Inspect the inlet needle tapered surface for any sign of wear
or damage. Be sure the spring loaded pin is free moving and
returns freely when pushed. The inlet needle and seat should
be pressure tested after assembly.
3. Inspect the idle speed adjust screw tip for flat spots and the
pilot mixture screw tip for damage. If any damage is present
on either screw, it must be replaced.
4. Inspect the float bowl vent tube for cracks near the bottom
of the tube.
NOTE: A continuous fuel leak from the carburetor
drain hose can be a result of a cracked bowl vent
tube.
6.14