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How Do I Vacuum Test / Pressure Test the Motor?
The port plug opening is for vacuum testing or pressure testing.
Get a plug the same size and thread, bore it out and install a nipple in it for a
hose to the vacuum pump, or purchase a premade plug or the whole kit from us
(priced according to cost of the pump at the time.)
To test the vacuum, remove the hose from the special plug and screw the plug
into the port in the motor compartment. Then re-attach the hose and pump it
down to neg 15 inches in vacuum and it should hold indefinitely. If it does not
hold, release the vacuum and move the hose to the pressure port on the pump.
Then pressurize it and stick it underwater to see where the leak is, or spray liquid
soap on the possible leak areas to find it.
If it is the plastic, send it back to us to be welded.
If it is the motor seal, replace it.
If it is the o-rings, replace them.
If it is the connections (which it never is unless you screw with them and do not
put them back correctly), send that lid to us for redoing.
Any connections need to be held on both sides to tighten or they will back out of
their threaded slots.
What Does The Vacuum Hand Pump Look Like?
Gavin Scooter User’s Manual and FAQ (
George Irvine 2002)
