in 1939 in Toowoomba Queensland Australia by the Southern Cross Foundry.
Southern Cross PA-A is a member of the P type engine family
consisting of the 2HP PA, the 3 or 4HP PA-A these are referred to as the small Ps.The other
members of the P family are the large Ps
PB, PC, PD and are 5 or 6HP.The PA-A was
manufactured between 1936 and 1939 the total number produced was 559 engines. It
is a four-stroke side valve engine.The
engine is water- cooled and came with three options for water-cooling.A front mounted rectangular hopper or hose fittings to an external tank,
or a round hopper mounted on top of the head.The
PA-A with the round hopper mounted on top of the head is uncommon and quite
petrol engine that had a diaphragm operated fuel pump.The carburettor is of the adjustable needle and seat type with butterfly
valve operated by governor.Without a
float bowl and float to control fuel flow as more modern carburettors have, this
engine was fitted with a fuel return line that piped excess fuel back into the
fuel tank much the same as found commonly on diesel engines.