Taking everyone's advice, I jumped right in and cleaned out the tank. This is probably one of those borderline cases where it might have been fine, but I'm glad I cleaned the tank!
In my case, the process was very simple - open two inspection ports
, pump out total of 5 gallons of fuel, using paper towels and clean rags, mop-up the sediment. Very little was stuck to the sides and in general, it came up remarkably easy.
Here's an after photo
I'm still undecided what to do with the old 5 gallons of fuel. It doesn't look too bad. I'm going to let it settle for a few days, call around and see if there's any way to dispose of or an inexpensive way to filter. Anybody with a portable filter in Long Beach??
Anyway, thanks again for all the comments and encouragement to tackle this project
. It was very easy to do and I encourage folks to inspect their tanks
- you'll be surprised by what's in there!