fuel gauge, noise from seacock, water on top of fuel tanks

[gbrogan]

Just bought used 2015 325 DC and have discovered several issues not picked up on survey or disclosed when asked by owner and broker:
1. Despite 6 hr run from Newport, RI to Long Island, port tank read full the entire trip and even once docked. Any thoughts?
2. There was water on top of gas tanks by sender despite hatches being closed on top (the white plastic circular ones). Any thought where water could be coming from?
3. There was water dripping out of the overhead cockpit light above the helm. Thinking this may be coming in from horn opening on topside of hard top?
4. Stereo has a constant hum/? feedback. What might cause this?

Any help/similar experience with any of these issues much appreciated. Spent a lot of money on "dream boat" and did not expect this from a Pursuit.

Thanks

[MarkT]

It could be the sending unit is not adjusted correctly. It takes a few hours for mine to drop down, but only at rest. If underway they show full because the fuel is at the back of the tank (so are the sending units) because of the running angle.

Those white hatches can leak, especially if they are not sealed properly. They also have an o-ring that could be bad. If not , clean that o-ring and give it a coat of silicone grease. Make sure the outer ring is properly sealed into the deck with some 4200. .

Could be anything up top, again they must be sealed properly. Don't think it always comes correct from the factory, even high end boats have problems.

Hum? only when engines are running?

[gbrogan]

Mark
Thanks for the reply
Much appreciated
Gerry

[Brossyvega]

My father in-law has the same boat. His boat also gets water on top of the fuel tank. I found out it comes from the cockpit air conditioner when it is on.