Looking for a special B/S carburator the run on natural gas, and not regular gas.

test power circuit --fuse switch-wiring/connections-starter--safety sensors

Make sure you have the switches in the correct position to switch from gas to propane.

Jill, Natural gas stoves can be converted or ordered to run on LPG.
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check spark plug or plugs then carburator.

Sounds like the fuel pump isn't working, you can buy service kits though quite often corrosion will prevent you from removing the valves.. or it could simply be the fuel cap isn't venting, remove fuel cap and see if the engine continues to run!

Quick and easy way is while the vehicle is running get a can of carburator spray and start to spray in areas where there are vacuum lines or places for vacuum leaks like the intake manifold. If the idle changes in a area when you are sprying it, you will know the vacuum leak is in that area and you can narrow it down from there. I have special tools for this but use them on a regular basis so i need them and they do cost. I hope this helps you and good luck.

by bottle i am assuming you mean propane. yes there is a difference , natural gas is mostly methane gas (ch4) a very small molecule, propane is (c3h8) a much larger molecule. so they require different gas nozzles and cannot run a unit on the other fuel, some can be converted to run other gas. generally natural gas units are cheaper to run, but cost more for installation as a gas line has to be run to the unit and benefit of not running out of fuel. hope this helps.

hi,sounds like the float in the carb is stuck in the fully open position,you will have to take the carb out,take the bowl off the bottom of the carb and inspect the float needle assembly,the little clip that holds the float to the needle valve may have come off,allowing fuel to run unchecked into the carb and ultimately out through the overflow..hope this helps..cheers

Hope you drained the oil and also changed the oil filter.
This problem of cutting off is a carburator/fuel related issue.
I guess the fuel might not be pouring in to the float chambers faster enough.
Try this, remove the air -filter and thn start the engine and as it is about to cut off, block the intake(by your palm) at the carburators and see what happens...taking care not to over block it as the gas may pour out and also flood in the combustion chamber rendering it to shut off due to to much fuel.
If it does respond and stay running thn the problems is tht the carbs are not getting the gas as required and probabley you may have to recheck the float level, the float pin,carb synchro, air-fuel mixture.
Check the pet- c o c k too.
Hope this helps!

there is exhaust that runs from head to head under carburetor . there should be a damper that opens when cold and closes when hot . when it stays open after motor reaches operating temperature gas in bowl boils and gas is a vapor instead of a mist and causes motor to run lean .