Fuel Tank Installation (cont’d)
4. Slide the fuel tank guard into the lower fan housing
and tighten the
two
hex screws retaining
it.
Tighten
the
two
corresponding locknuts.
5.
Slide the retaining ring onto the fuel line, then push
the line onto the fitting near the primer bulb. Slide
the retainer ring down, over the fitting, to secure
the line. See Figure 38.
Figure 38
PRIMER PUMP
Primer Pump Proper Use
Proper operation of the primer system is as follows:
See
Figure 39.
CHOKE LEVER
OVERFLOW
TUBE
\
Figure 39
Push the tickler button fully inward.
Manually pump the primer pump until a small
amount of fuel is emitted from the overflow tube.
Stop pumping the primer pump and release the
tickler valve. The engine is now ready to start.
Primer Pump Operation
The primer system on the TC3000, TC4000 and
TC5000
is
used
on cold starts only and ensures that fuel is
present throughout the entire fuel system.
It
relies on
manual pumping action to draw fuel into the primer and
to pump
it
into the fuel line and the carburetor.
The primer pump uses a
two
step operation to pump fuel
to the carburetor. Pushing on the primer diaphragm does
the following: See Figure 40.
INLET CHECK BALL
OUTLET CHECK BALL
VALVE CUSHION
Figure 40
1. The inlet check ball seats.
2.
The outlet valve is pushed against the porousvalve
cushion to allow fuel or air (whatever is in the
primer diaphragm) to pass into the fuel line and
carburetor.
Releasing the primer diaphragm allows
it
to come
back
to
its
original shape which results in the
following: See Figure 41.
FUEL FLOW
\
VALVE CUSHION
\
OUTLET
VALVE CUSHION CHECK BALL
INLET CHECK BALL
~--~-
Figure 41
1.
The vacuum produced
by
the diaphragm seals the
outlet check valve. This prevents fuel from being
drawn from the fuel line.
21
To Next Page
Loading...
