Seems my boat ran fine in the yard but once I put gas into it on the way to the lake and even though it sat for another week before I actually took it out it was bad gas. Apparently dipping it on a launch ramp seems to bring it on and running it around on the lake with a different tank hooked up also keeps the water in the mix. (I changed tanks while it was running so well to be sure..) It killed it in about a minute. I can't believe I bought bad gas. I just think my brand new unvented at this point gas tank is condensing some moisture. <br /><br />Which brings me to the question. I have an alumininum gas tank I bought new last year. It has a threaded hole for a vent. Just no vent. I've always just left the cap loose when using it. What do I want to do for a vent? What is accepted construction for a vent?<br /><br />Is there anything I want to do to the tank once emptied for the moisture? I was just going to drain it and throw some heet in? <br /><br />Thanks... Gary