ORIGINAL: Dr1Driver
An inline filter between the tank and engine can clog or loosen and mess up the mixture. I use a klunk and inline filter in my supply jug filling line. Keep the filler nozzle off the ground and your fuel will be clean when you pump it into the tank. Anything that's pumped in when de-fueling will be filtered out when you fill again.
Dr.1
Not if it came from your tank, and is caught by the fuel filter. It will flow back into the tank when you fill the next tank.
I never thought about the crap from the muffler pressure. I had pointed out to a fellow new flier at the field that when he fill his tank thru the plane's filter that if he does not reverse the filter anything it caught while fueling will be immediatly sent to the needle.
I think I will start defueling thru a different hose than for fueling.