My boat is beeping every 40 seconds

[dmann]

I have an older 70's fiberglass tri-hull runabout with a rebuilt 96 50hp Johnson. Bought this about a month ago, took it out once to make sure all was well (it ran great), then winterized the motor. I took both batteries out, charged them and stored them in my garage. I covered the boat well for winter - all seemed well. About a day later, the boat started beeping a single beep about every 40 seconds or so. Seems like it may be coming from the area around the motor control, not even sure how it is beeping without the batteries. Does anyone know how I can shut this off?

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