Twomed - it's propane
Chris - I was going to get that Slick Stick even with the $13 extra for shipping but I don't have the clearance to access from the side. I would have to pull the front bumper off and move the entire generator forward. Not that big of a deal except the clamps and bolts for the muffler could be tough to get off without screwing them up.
I made a DIY Slick Stick and I'm waiting for the epoxy to harden - 220 wet sandpaper on one end and a piece of a scrub pad on the other. The bands look dirty but they don't actually looked glazed. I'll see how this works fist.
