You could do the oldtime cleanup method we used 50 years ago- - - - -soak the pickup tube in gasoline, set it outside in the dirt, and toss a match at it. All the sludge turns into nice easy-to-remove ash. Remove the pickup screen first, so it doesn't burn away. This procedure also works on sludged-up road draft tubes.
Jerry
Last edited by Hotrod Lincoln; 03/14/2010 4:16 AM.