my airplane sat for 7-8months
first flight of the day lots of engine surging
shut down the engine to refuel and the engine ran perfect
this happened two days in a row. just removed the tank and it appears there is algae a dark matter on parts of the inside of the tank
. I have put alcohol in the tank and shake it pretty good but that doesn't seem to make a difference.
any suggestions on what I can use to dissolve and clean the tank and hopper tank?
I can use some good advice. there is a baffle in the tank which makes it difficult to reach everywhere
thanks
stan