FUEL SYSTEM/CARBURETION
4.16
NEEDLE AND SEAT LEAKAGE TEST
1. Installthefloat bowl. Invert the carburetorandinstalla
Mity-Vacâ„¢ (PN 2870975) to the fuel inlet fitting. Apply
5 PSI pressure to inlet fitting. The needle and seat
shouldhold pressureindefinitely. Ifnot,inspectneedle
and seat and seat O-ring.
FUEL LEVEL
A fuel level test can be performed on some models if the
drain hose fitting is accessible. Be sure to re-attach the
bowl drain hose after performing the test. A fuel level test
allows you to observe the height of thefuel inthe floatbowl
without removing the carburetor. The fuel level can be ob-
served with the engine either running or shut off, however,
engine must run briefly to allow fuel level to stabilize..
1. Attachaclearlinetodrainfitting. Besurelinefitstightly
on fitting. Position hose along side of carburetor as
shown.
2. Open bowl drain screw by turning counterclockwise
approximatelytwoturns. Startandrunenginefor3to5
secondstoallowfuelleveltostabilizeintheline. Iflevel
is out of specification, remove carburetor and inspect
inlet needle and seat, float height, passages, etc.
3. If aline wasremoved toperformthisprocedure, itmust
be replaced.
Mity Vacâ„¢ PN 2870975
1.5 mm
.060″
Bowl Mating
Surface
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