That is an oil pressure safety switch for the electric fuel pump that also shows in the picture. It should measure continuity when the engine is running, no continuity with the engine off. It is a USCG safety requirement for a gasoline engine with electric fuel pump. Four wires attached seems odd however, you might want to trace them down. Typical installations have two wires: one from the ignition and one to the fuel pump.
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More importantly: can I safely bypass it?
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No, SAFELY being the operative word. The only purpose for an oil pressure safety switch is safety.
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Last edited by ndutton; 07-02-2021 at 02:25 PM.
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