Take an old speedometer cable, chuck the end into your (variable speed) drill motor, and probe the tank outlet with it. If it tries to wind up into a pretzel, it might be necessary to cut it off where most of its length is supported by the pickup tube. Spin it with the drill motor, and gently feed it into the clog. Good luck!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!