Both of you guys, the first thing you should absolutely do is go at the deck
and get the gelcoat
to shine, then wax it. It's not just cosmetic; it protects everything underneath and once gelcoat
start to deteriorate, the longer it goes the harder it is to bring back, and eventually it will fair altogether, requiring more time consuming and expensive repair.
To clean the deck and topsides (hull between the waterline and the deck). I would use Mary Kate ON/OFF, available at most marine
supplies. It's basically an acid, but it will take almost ANY stain off. Keep it off your skin, and paint
if possible, or rinse those areas immediately. It's a great prep wash before compounding and waxing.
As far as the interior
goes, I would pull the cushions out and wash the covers as best you can. Dry out the foam and if it's too far gone you might want to replace it although good foam is surprisingly expensive.
Go at the mold/mildew and get it out, wiping down surfaces with white vinegar as a last step; the acid in the vinegar inhibits mold
growth, to a degree.
If there is a lot of mold
it means moisture is potentially getting in the boat. Check every through-deck fitting; if they are hidden under headliners or in cupboards, open them up and check. If a fitting on the deck is leaking you need to fix it, not only to simply keep the water out but also to protect the core
of the deck. It's almost certain that on an '85 Hunter something on the deck is leaking if the previous owners have done nothing.
Also, get a dehumidifier for the boat and leave it running when you're not there.
There's lots more to do, obviously, but those are two things I would do right off the bat.
Oh, of you can get ethanol-free gas for your outboard
, do it, particularly if you don't run it that often. If you can't get ethanol free gas, put a fuel
stabilizer in the gas mix. It won't cure the problem but it will help.