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My A28 is having a weird alarm issue in that the alarm in the engine compartment beeps every 2 seconds or so, but only with the ignition in the off position. No issues with the alarm while underway at all. The only way it stops is if you turn the ignition on or shut off the master power.

We recently experienced a low voltage alarm and had replaced the batteries, so no more low voltage issues.

Any advise out there?

What engine/drive?

If Mercruiser, could be many things and you will have to get the boat scanned to see what code is set. One reason I bought a Rinda scanner so I can scan it myself.

Don't happen to be in the Los Angeles area do you?

Does your power package have a drive lube resivior? Many of the mercs have the 'Guardian System' that checks fluid level pre-ignition I believe. Common issue is drive lube being low.