18
FUEL TANK & LINES
Make sure that the tank is well rinsed out
with methanol or glow fuel before installation
and that the pickup weight is well clear of the
bottom of the tank when held vertically.
Connect fuel line between the pressure
nipple on the silencer (large i.d. hole) and
the tank to supply muffler pressurized fuel
for more stable fuel delivery.
Connect fuel line between the breather
nipple on the back cover and silencer
breather nipple (smaller i.d. hole).
General Plumbing
Make connections as shown in fig.1. With the
airbleed type carburetor it is necessary to set
the idle rpm a little higher to prevent engine
cutting.
Plumbing suitable for aerobatic flights
With the general plumbing the fuel in the tank
may flow into the silencer when the throttle is
reduced to low speed during inverted flight or
vertical dive which may result in the engine
stopping. Plumbing shown in fig.2 prevents
fuel from flowing into the silencer and
stopping the engine. This plumbing also
allows the idle speed to be set a little lower
and also results in longer flying time due to
excess fuel not flowing into the silencer.
When the tank is filled the fuel level is higher
than the carburetor center line. To prevent
the fuel from flowing into the cerburetor use a
commercially available fuel shut off. Release
the fuel shut off before starting the engine.
Be sure to install a fuel tank following the
instructions shown in Fig. 1 and Fig.2.
If a fuel tank is installed off the instructed
position, stable idling will not be able to
be secured even if proper adjustment is
made.
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Fig. 1 General Plumbing
Note: When cutting silicone tubing,
use knife or razor blade.
Silicone Tubing
Do not use wire cutter or pliers.
l If you should need to clean out silicone
tubes, use methanol or glow fuel, not
gasoline or kerosene.
No.1 Nipple (larger hole)
No.5 Nipple (smaller hole)
Fuel Filter
(commercially available)
Fuel Stopper
(commercially available)
T Nipple
(supplied)
Refueling
tubing
Plug (commercially available)
Approx. 10mm
Carburetor
Center Line
Fuel Tank Center Line
Install a fuel tank so that carburetor center
line may be positioned approx. 10 to 15mm
lower than fuel tank center line.
