Mercury Sugar Sand 90 HP (1995) Beeping noise

[Fabian Giudici]

Hi,
I have a Mercury Sugar Sand 90 HP (1995) Mirage Jet Boat which I bought couple months ago.
Recently it started making a beeping noise under the console, I looked and it comes from a little cylindrical horn. It only beeps when I give the engine some throttle but as soon as I make it go under 8/mph the beeping goes away.
I have no idea what it is or where to start looking. Any help would be much appreciated!!

 

[Sugar sand]

Check and see if you have an aftermarket depth finder.
Make sure it’s not set to some strange setting.

Mine did that after I accidentally changed the settings one day while in my garage.

Strangest thing, it would only do it on hard acceleration, as soon as I let off the throttle and slowed to a crawl, it would stop.

If you have a depth finder in your dash look underneath and see if you also have two beepers, one for the depth finder and one for the boat.

I set mine to 0, which is off.
Took it out today and that’s what it was.
Thing was puzzling me so bad.

So, why it wasn’t sounding unless I accelerated hard is beyond me.
Guy who owns a marine place in town tipped me off yesterday by saying, “I’ve seen depth finders do some crazy things”.

He was correct.