Coleman Classic Liquid Fuel 2 Burner... - Coleman Classic Liquid Fuel 2 Burner Camping Stove -

Are you stating that the igniter will not work. Is the igniter failing to produce an ark? Are you stating that the burners fail to be supplied with gas. With both the bottle's valve open and the stove turned on. Make sure the propane bottle has gas first. Is the bottle heavy and do you feel liquid moving around inside like water if you move the bottle around in the air? Check the valve. You can not open the valve quickly. On these 20lb. bottles. You must turn the knob very slowly or the bottle will slug. You will need to shut the gas flow off, wait a minute for it to equalize and try it again. Open the gas flow slowly(at the bottle). Now try to light the stove. If the stove is still not lighting you can try another bottle but more than likely the regulator has gone bad and will need to be replaced.

Looking for a spider web is a great starting point. With these propane devices it is pretty common for liquid residue/condensation to build up in the feed lines. I would get an air compressor and blow out the lines and try again. Do not use air in a can. That will only add more moisture.

I understand your concern about your 2-burner Coleman stove slipping. Here's an article with a very simple and cheap DIY on how to prevent your Coleman camping stove from sliding. Coleman 2 Burner Camping Stove DIY Non Slip Bottom Traipsing Around

Do you mean unleaded? Officially no, unless it's marked "unleaded" or "dual fuel" (in Coleman speak, dual fuel means unleaded gasoline OR white gas) which means all the seals are rated for the additives in road fuel.
Unofficially yes, but gasoline is not a good idea because it tends to clog the generator with soot, it goes stale very quickly and it smells bad.
I would stick to Coleman fuel, Primus Powerfuel or Aspen 4. You probably don't get through so much of the stuff that cost is a big issue.

Have you turned it a turn left before you pump?

Here is Coleman's repar part website.
You may want to replace the valve if it is leaking.
http://www.coleman.com/coleman/parts/product_category2.asp?category_id=210

If you are talking about the old type that runs on Coleman fuel, start by putting some oil in the hole beside the pump knob to make sure that the gasket is lubricated. Fill with fuel and pump it up, keeping your thumb over the hole in the end of the pump knob. When you have pumped up enough pressure, turn on and light the main burner, then secondary burner if necessary.

There is water in your fuel. Drain the tank and flush it out with denatured alcohol. Refill with fresh fuel.

Got my solution by talking to a fellow at REI. He showed me how to take the Coleman apart and check for problems.

There is a small "O" ring with in