FUEL SYSTEM/CARBURETION
4.15
NEEDLE AND SEAT LEAKAGE TEST
1. Install the float bowl. Invert the carburetor and install a
Mity-Vac¥ (PN 2870975) to the fuel inlet fitting. Apply
5 PSI pressure to inlet fitting. The needle and seat
should hold pressure indefinitely. If not, inspect needle
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 the fuel in the float bowl
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. Be
sure to review all fuel warnings below.
1. Attach a clear line to drain fitting. Be sure line fits tightly
on fitting. Position hose along side of carburetor as
shown.
2. Open bowl drain screw by turning counterclockwise
approximately two turns. Start and run engine for 3 to 5
seconds to allow fuel level to stabilize in the line. If level
is out of specification, remove carburetor and inspect
inlet needle and seat, float height, passages, etc.
W ARNING
Gasoline is extremely flammable and explosive under certain conditions.
Always stop the engine and refuel outdoors or in a well ventilated area.
Do not overfill the tank. Do not fill the tank neck.
Never start the engine or let it run in an enclosed area. Gasoline powered engine exhaust fumes are poison-
ous and can cause loss of consciousness and death in a short time.
Never drain the float bowl when the engine is hot. Severe burns may result.
Do not smoke or allow open flames or sparks in or near the area where refueling is performed or where
gasoline is stored.
If you get gasoline in your eyes or if you should swallow gasoline, see your doctor immediately.
If you spill gasoline on your skin or clothing, immediately wash it of f with soap and water and change clothing.
Mity Vac¥ PN 2870975
1.5 mm
.060s
Bowl Mating
Surface
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