I'm considering installing an auxiliary fuel tank approximately 200 gallons with an electric pump in the bed of my 3500 HD to fuel my boat. Any pros cons and/or recommended suppliers.

sounds dangerious, I used to do it , not anymore .

No expert by any means, but I thought diesel fuel was the only type of fuel that could be in AUX tanks. Would this be a mobile AUX tank, or mounted in truck?

here are DOT certified tanks for Gas: http://www.jmesales.com/catalog/fuel...tanks,7297.htm

That would be a big tank and damn near take up the entire bed of your truck. Not to mention the 1400 lbs it would weigh when it was full, expansion/contraction of that much full when it's out in the sun like that.

doesnt seem like a good idea to me.

Any DOT certified tank would work. They don't take up as much room as you think. Most of the time the ones i have seen were used to haul the boats race fuel. I have had a few friends use these tanks ,as fuel was much cheaper in S.Carolina than in Fla.

I just want to keep from dragging the boat out of the water everytime I need fuel. 93 Octane and our marinas are an issue. They have several 95 - 110 gallon tanks which are DOT certified. I know an accident can happen anywhere but I would not travel long distance with it full.

maybe a fuel trailer would be a better option if your boat stays in the water.

I did that in Fla until I changed my 700's to 89. The marinas constantly gave me grief, even though they did not have fuel to sell me. It came to a point I had to pull the boat anyhow to fuel.PITA..but the 91 700's were way more fuel efficient than the 89 version..so If I knew then what I know now mabe alot longer hose disguised as a water hose?