So I am doing a ton of work to my Viper to try not to miss another season. Because I am still working on it I can not shrink wrap it. I have the actual cover on it which I just treated with sunbrella waterproofer and I also have a brand new tarp covering the boat.

I do not have a garage big enough for it or it would be in it. If it rains and I go outside and feel up under the tarp the cover is not even damp. The bow has no hatches.

What else can I do?

most likely condensation. If no gas use a heater to help keep dry.

and a fan, if the cover has no way to vent you will get stagnant air and that can lead to mold/mildew.

I am getting a 1/2" deep puddle in the center of the bilge. The engines are out so it is wide open and the holes for the exhaust are wide open so it can vent.

The boat is backed up to my garage door so the water is not coming in through the exhaust holes.

seriously, condensation can amount to this. if the exhaust holes are open and humidity can get in and there is not heat or fan moving air your gonna have this. seal those holes and put a heater in it with a fan. make sure no gas in boat or boom. or get an extreme bilge heater that is ignition proof

Paul, just drill a hole in the bottom....problem solved!

Do you have a neighbor Viper hater?

x2 Condensation makes more water than you think.

Thanks! I don't know why I had not thought of that already!

After the rest of the crap I found that was done half assed on the boat I can't believe there already isn't a hole!

Paul - When I used to keep the boats outside, before closing the hatch we rigged a 100 Watt incandesent bulb dangling so the bulb didn't touch anything. You'll be amazed how much moisture it will burn off. You can either use an old style mechanics light or a light fixture used in construction temporary lighting. If there still is significant water after a day or two, it is not JUST moisture, you may have water intruding through the cover some how or perhaps the rub rail?

Oh yeah, the bulb has to be plugged in and lit! LOL