80 bird with 3208 cat keeps stalling - PLEASE help

[Jeff Miller]

Heed well what George said about keeping the tank full and
maintaining proper algaecide levels. Algae in a tank is a big problem.

Your comment about the heavy suction at the secondary/engine fuel
filter indicates a pretty solid blockage upstream. As you didn't
mention any changes other than the fuel filters, and it sounds
upstream of the engine filter, look at the Racor filter system (the
one next to the LP tank). It also has suction? The chamber around the
filter element is the "in" side, so probably further upstream still.

Check the new Racor filter to see if it has a lot of slime/algae on
it. There is a hole in the top of the plastic filter element that can
be popped open to bypass the filter in an emergency, but I wouldn't
recommend it if you have a serious algae problem.

The next step IMO would be to detach the inlet hose on the RACOR
filter, open the tank's fuel fill cap, and blow some low-pressure air
through the fuel line back to the tank. Listen for bubbles through
the OPEN fuel filler.

If this clears the line, and you have an algae problem, your troubles
are far from over, but at least you've found the source.

- Jeff Miller