Well guys I am a little late but here I am. The pics of the UAT are from my Bobcat. I sent the pics out to a few people who I know run jet cats. I went to Matt as well as Bob Wilcox because I know they won't let this thing die until we are exactly sure what to check for and prevent in the long run. I have come to the conclusion that it is algae inside the UAT bag. I run JP-8 exclusively, as well as Mil spec 7808 oil (I believe this is the same as aeroshell 500, but not sure).

The UAT in my Mig looks very similar. Since installing the new bag I have noticed that the RPM's don't seem to fall off as much as before. I have been running the engine on both Jet-A, JP-8, and Kero K-1 from Crown. I haven't flown much at all in the last month due to preparing to make a family move and such.

Don't sweat anything yet. It is apperantly obvious that there was a large amount of algae growing inside the UAT bag. But here is the good news. This bag is also an unbelievable filter in that the max pump voltage never went up at all for the simple reason that none of the algae left the UAT. The UAT bag is large enough to handle this without a problem in the air.

Being as large as it is did not affect the medium to high output of the engine, as well as the filter in the fuel line from the pump to the fuel valve is clean. There is absolutely no evidecne of algae anywhere inside the fuel system except the UAT. So the end result is the UAT did more than its job in this case.

John Redman
Team BVM, Jet Cat USA, Shultze Chargers