[BobGee]

My father was an Air Force pilot and flew bombers in WW2 and Korea. I flew with him in private aircraft when I was a kid. He was terrified of water in the gas and always topped off the tanks in the plane (and the boat) when he came in. I also flew with several other WW2 pilots. Same thing. There’s probably a lesson here.

 

[BobGee]

Use is definitely a big portion of this. If you are using the boat at least a few hours every week, it's less of an issue. If you intentions are to use it every week, but it doesn't always happen, fill it up.

If you’re in a humid place and a cold front comes through and the temperature drops 30 degrees you’ll have condensation in the empty part of the tank . That heavier water collects at the bottom of the tank where it accumulates. Even if you go out a few days later.

 

[BobGee]

I'm not going to disagree with that one bit. It's still a matter of the amount of condensation. I have yet to see a boat come through the shop with water in the tank fuel issues that was caused by condensation. The ones I see are either: a) sending unit or pickup seal failure and hence saltwater or rinse water intrustion; b) fuel vent went under a few times too many and there is now saltwater in the tank (or lake water); c) the boat sits, the fuel goes stale and separates, varnish forms, they pay me money.

That’s reassuring. I guess I shouldn’t worry. Thanks