4. FUEL PUMP
The Victor 2 Plus /Victor 2 Super engine comes equipped with a Mikuni Membrane Pump. This is
a pneumatic pump operated by the pressure pulses from the crankcase of the engine.
Install the pump 3 - 4 cm higher than the crankcase pressure outlet. This will prevent a build-up of
fuel / oil mix in the lower compartment of the fuel pump, which in turn may lead to less efficiency.
The length of the tube, which connects the engine crankcase depression to the fuel pump, should
be as short as possible, ideally less than 10/15 cm long.
If your aircraft fuel tank is located more than 70cm below the carburetor and fuel pump, install an
electric pump near the fuel tank. This pump will help push the fuel up to the membrane pump and
prevent vapor locks pump subsequent engine failures. Stop: The maximum fuel pressure exerted
by the electric fuel pump should not exceed 0.3 bar.
When fitting an electric booster fuel pump ensure that there is fuel filter installed in line before the
pump. This will prevent the electric pump from clogging up with foreign material, which may
result in fuel starvation and resultant engine stoppage.
The electric booster fuel pump must be of the type where it allows fuel to pass through even when
it is not working.
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