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Inverted oil system of my 1974 Citabria seems to have an electric oil pump. When inverted, pressure drops under 20. How can I test it?
Inverted oil system of my 1974 Citabria seems to have an electric oil pump. When inverted, pressure drops under 20. How can I test it?
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OK. Foud how to test the inverted oil pump: There are two mercury switches on the upper right side of the firewall. They are fixed in a 45 degree angle between flight level. Turning one or both upside down will activate the pump should the master is ON.