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How Does a Fuel Valve Work?
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Many honda mopeds
and scooters use a vacuum operated fuel supply valve. It is on the
bottom
of the tank, and has two hoses going to the carb. The larger one is the
gas line, the smaller is the vacuum line.
When the engine is running, the
vacuum line turns on the fuel valve, allowing fuel to flow into the
carburetor.
When you run out of gas, so there is none in the carb at all so the
engine
will not run, and you add fuel to the fuel tank, you need to crank the
engine over about 15 seconds to allow the fuel valve to open long
enough
to fill the carb and start the engine.
Many other brands use similar
valves on their mopeds, and many are located on the frame, separate
from
the fuel tank. Razz, Sundiro, most Chinese bikes, Suzuki FA 50, and
many
others use this type of valve.
To test the
valve, unhook the smaller (vacuum) line from the engine intake manifold
and suck on it. (apply vacuum). This operates the diaphragm in the
valve,
and fuel should flow out. If fuel always flows, even when the vacuum is
not applied, the valve may be stuck, or dirty. |
Scooter Therapy Inc
12 North Few
Street | Madison,
WI
53703
toll
free
1-800-411-1543
| local
1-608-255-1520
fax
1-608-255-1587 | E-mail
|
Scooter Therapy
Inc
12 N. Few
St
Madison, WI
53703
toll
free 1-800-411-1543
local
1-608-255-1520
fax
1-608-255-1587
E-mail
Hours: M-F,
9-6 Saturday, 10-3 CST
copyright
(c)
2000
Scooter Therapy
inc.
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