I'd almost bet on the tank vent, particularly with the long time frame to
the first time it fades.
I totally overlooked that on my 1st post. Too obvious LOL.

-W



"noah" wrote in message

If it's flattening the bulb, there is a restriction in the fuel tank,
or a fuel tank venting problem (creating a vacuum).

If you're using a portable tank, is the vent cap loose? If it's a
"built-in", I'd check the vent, and for crap in the tank that is
blocking the pickup tube.

Good luck,

...carry on.
noah

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