AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER
Page
40
Whenever draining or refueling, make sure master switch is set to OFF (key in full left position).
Draining the fuel system:
The gascolator is located beneath the bottom engine cover on the left hand side of the fuselage.
To drain the fuel system, open the drain valve on the gascolator. Drain approximately 1/2 cup of
fuel. Try to prevent ground pollution by collecting the fuel with a canister. To close the valve,
simply turn it in the opposite direction. Do not use force or special tools!
CAUTION!
Always drain the fuel system before moving the aircraft. This ensures any water or
particles will be drained and not remixed and remain in the fuel tanks.
Refueling
CAUTION!
Before refueling, it is necessary to ground the aircraft!
Refueling can be done by pouring fuel through the fuel tank openings on top of the wings or by
using the single point fueling valve on the lower firewall.
Refueling using the electrical fuel pump: First, make sure the fuel hoses are connected to wing
connectors and that both fuel valves are open. Connect one end of the fuel pump to the valve
beneath the bottom engine cowl. Submerge the other end of the fuel pump, which has a filter
attached, into the fuel container. Engage the fuel pump by engaging the 12 V socket switch on
the instrument panel. After refueling, it is recommended to prevent air pockets from forming
inside the fuel system, that the pilot drains some fuel with both fuel valves fully open. Also,
leave the engine running at idle power for a couple of minutes prior to taking-off, and test the
engine at full power for a minimum of 30 seconds before takeoff roll begins.
Should you be experiencing slow refueling with the electrical fuel pump, you should replace the
filter. You can use any fuel filter for this application. It is recommended to use additional plastic
tubes attached to the fuel tank vents and leading to the ground in order to avoid over-spills of
fuel onto the airframe when filling the tanks completely.
CAUTION!
Use authorized plastic containers to transport and store fuel only! Metal canisters
cause water to condense on the inside, which may lead to engine failure.
Engine lubrication system
Rotax 912 is a four-stroke engine, equipped with a dry sump and lubricated centrally with use of
its own oil pump. All the oil needed is located inside an outer canister. When the engine is
running, the oil cools by passing through a radiator, located on the left-hand side of the bottom
engine cover. The oil quantity can be checked visually with the oil level bar. Make sure the oil
quantity is sufficient (within marked limits) at all times.
CAUTION!
Oil temperature, pressure, and quality is precisely defined and must not, under any
circumstances, vary from the placards and standards.
