Bounder 1995 34A Gas

I think my fuel/gas has turned. It has been about 8 months since I put the present fuel in the tank. I did add red stable but because of a series of health issues we have not been able to go out in the RV, just start it in the storage yard each month. I have about 50 gallons in the tank. It will run when I spray starter fluid into the carburetor but dies when the starter fluid is burnt up. It is in our RV storage yard. I think my choices are to add an additive if there are any users out here who have had success with bringing that much fuel back to life. My other choice is to find someone to pump the tank dry and then add fresh fuel and see if it starts. Thanks for suggestions, you members have been a great help a few times in the past. This happened one time before and when I sprayed the starter fluid into the carburetor the RV ran on its own. I have read on here that red stable does not work with etenol based gas. Thanks.