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Old 12-08-2021, 03:05 PM   #1
Lt. JG
 
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Default Alarm buzzer

Mercruiser 7.4 mpi S.N. 0L655251. My ECM is a MEFI 3.(DELPHI 16237009). My problem is audio buzzer sounds just after engine start, 1 second on and 3 seconds off coutinuous . I replaced coolant sensor and checked the wires. I replaced drive lube tank and checked the wires. I grounded and ungrounded the oil pressure switch wire. I do not get any fault codes. I sent the ECM to MEFIburn.com
and they said it checked ok. Thanks for any help.
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Old 12-09-2021, 02:05 PM   #2
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Gear Lube sensor or IAC??
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Old 12-09-2021, 02:11 PM   #3
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I plan to check the gear lube sensor wires today. Thanks
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