Now I'm a little nervous.

The following photos show two BVM fuel stoppers from tank kit #T619. I bought two kits. One I used on my 32 oz main tank, and one I used on the 24 oz collector tank.

I've only run 2.5 gallons thru this new jet.
While removing my engine from the jet today, the stopper on the 32 oz seems fine, but the 24 oz tank stopper came apart in my hand. I'm using clear K-1 and 2380 synthetic.

The only thing I can figure is the smaller 24 oz tank with the bad stopper is not always emptied during a typical flight, or engine run. The UAT is the next tank in line from it. Maybe that stopper soaks in fuel more. But should it have disintegrated? The UAT and in-line filter is clean , but there were large and small pieces of the stopper in the tank floating around. These stoppers have only been in use for three weeks. How often should I replace them? I'm wondering if my other jet buddies should do an inspection on their jets.

Chris