Diamond DA20-C1 - Electric Fuel Pump (Priming Pump) Operation; Fuel Prime; Fuel Pump; To Check the Fuel Level

DA20-C1 Flight Manual Description
Doc # DA202-C1 April 06, 2010 Page 7 - 20
To check the fuel level:
1. Insert the graduated end of the fuel dipstick into the tank through the fuel filler
opening until the dipstick touches the bottom.
2. Withdraw the dipstick from the fuel tank.
3. Read fuel quantity. The dipstick is calibrated in increments of 1/4 of useable fuel
capacity. (21.3 US gallons/80.5 liters for Type 1 Fuel System or 24.0 US
gallons/91 liters for Type 2 Fuel System).
NOTE
Several readings should be taken to confirm accuracy.
7.10.6. Electric Fuel Pump (Priming Pump) Operation
The DA20-C1 is equipped with a DUKES constant flow, vane type, two speed, and electric fuel
pump. This pump emits an audible whine when it is switched on.
A. Fuel Prime
The pump's high speed setting is used for priming the engine prior to engine start. The
prime setting is selected by turning the FUEL PRIME switch ON. An amber annunciator
indicates that FUEL PRIME ON is selected.
Revision 25
B. Fuel Pump
The pump's low speed setting is required for maintaining positive fuel supply system
pressures at low throttle settings. This setting is selected by turning the FUEL PUMP
switch ON. This setting should be selected for any low throttle operations, including
taxiing and any flight operations when engine speed may fall below 1000 RPM (e.g.
stalls, spins, descents, landings, etc.). The FUEL PUMP may also be selected ON to
suppress suspected vapour formation in the fuel supply system. Smooth engine
operation at high ambient temperatures with heat soaked fuel and up to and exceeding
the service ceiling has been demonstrated without use of the electric pump.
NOTE
Turning the priming pump on while the engine is running, will
enriches the mixture considerably. Although the effect is less
noticeable at high power settings when the fuel flow rate is high,
the effect at low and idle throttle settings is an over rich mixture,
which may cause rough engine operation or engine stoppage. It is
therefore recommended that for normal operations, the FUEL
PRIME be turned OFF.