Winter is coming along and I am just doing a little house keeping for my dad. He has a 2001 Champion 201 and basically all the gauges do not work. Im going to go look into it more when I get home this evening but, what could be the problem?

By the way it is kept outside with cover on.

If all the gauges are electric, the first thing to check is to make sure you have a good ground.

Chances are all the gauges have a common ground, so look there.  It's the most logical reason that all the gauges have failed.

The positive wire goes from sensors, for each gauge to that gauge.  It's not likely they all failed simultaneously.

so you think its pretty much a wiring issue? Theres is a giant wiring harness under the council, should i follow each wire to each gauge or what do I need to do. Sorry but I am very clueless at electric work without a diagram.

I'm not sure it's a wiring issue, but it's the first thing you should rule out.  It's the cheapest and easiest first step.

You certainly do not want to start swapping out gauges and then find the new ones aren't working due to a poor ground.

I'm not familiar with various makes of boats but usually there will be two buss bars, one with the fuses for the positive source of electricity and another for the ground connections.

If you want to check the ground connections to each fuse, get an electrical tester, the cheap kind with a light that will glow when 12 volts run through it. 

Touch the red lead to the heavy red lead at the positive buss bar, and the black to the heavy negative lead at the ground buss bar.  The light should glow.    Then, touch the black lead from the test light to the ground connection at each gauge, keeping the red lead touching the positive lead.  No light = no ground = no operative gauge(s).

Check around with your handyman friends.  They've probably got a tester in their assortment of tools and can help you out.  It's a quick test.  Only takes a couple of minutes.

Brother in-law is a electrician I'll try to see if he will let me borrow his. Thanks for the help by the way.

Brother in-law is a electrician I'll try to see if he will let me borrow his. Thanks for the help by the way.

You're welcome.

Heck, get bro-in-law to give you a hand.  He'll know exactly where to start, and where to go from there.  He'll certainly know more than I do.  I can fumble around with the basics, but that's about it.

Yea only problem is he won't do it if he knows it's for my dad. Kind of bad blood between my parents and my sister and brother in-law right now.

Oooops, sorry to hear that.  Not good when those things happen.

See what info you can glean from him without upsetting the applecart.