Question 2001 Monaco Diplomat fuel system problem

[latuslatus9]

My coach sat for 17 years with 3\4 tank of fuel. I believe it to be contaminated with algae. Is there anything I can do to eradicate the algae problem without having to drop the tank? Maybe a solvent of some kind to dissolve it? Hoping someone has a clubhouse tip for me.

 

[Oldb]

You can treat that fuel with a power service product called biocide. This will not get rid of the algae, but should kill it. It should drop to the bottom of the tank. Then you will need to pump out the dead algae and I would recomend all of the fuel from the tank. You may have a fuel distributer in your area willing to do this for you for a fee. You may go through a few fuel filters afterwards if there is still debri in the tank. Also if things are working well aftrwards and you get a load of fuel with a high biodiesel content this will act as a solvent and let loose anything remaining. And you will need a filter change then also.

 

[Old one]

What I would do.
I would use the biocide mentioned above.
Then go buy a cheap 12V fuel pump and rig it with 3/8 hose in and out. Snake the intake side hose into the tank and start the pump. It will act as a vacuum cleaner. Put say, 5 gallons into the tan and repeat above pump out. Then fill tank, ad biocide and drive it. Change teh fuel filter after a 200 mile trip. Sould work. Choice 2: have it towed to a truck place where they have fuel system pump out capability and let them do it and clean out the system.