Hello T.,
Was the engine starting and running fine before the "filtered fuel" was put in?
I used my Mr. funnel quite a bit without issues until I accidently ran over it with my service truck.
If the fuel was aged, it has lost most of its volatility.
I'm not sure if the funnel has a "shelf life" where it can just sit around for years.
The transition from a summer blend to a winter blend E-10 fuel is also an issue in many places this time of year.
In my area, a couple of years ago we had an issue with one of the fuel depots because the fuel got mixed with clear industrial silicone to "bulk it up" the fuel. It took quite a bit of testing and investigation before they finally found the cause. Several stations were affected and multiple lawsuits followed.
In another incident, a different fuel depot was delivering known bad water contaminated bulk fuels to unsuspecting independent small country stores.
