[hatran]

After I started the engine, the beep sound kept until I speed up and it is no more sound. It it happened again whenever I started.

[Dredd]

Is the finder still reading when you speed up or does it go blank? It kind of sounds like your depth alarm might need adjusted.

[ShabahZ250]

Are you sure it's the depth finder? There's a "warning system" with an audible alarm for the engine as well.