Had a fuel drain absolutely full of water on a club aircraft before now (later found out it had been grounded at another airfield for almost a week due mag failure). Drained a couple of litres from each tank, giving the wings a shake to dislodge any trapped pockets, was all looking good before long.
Started spluttering like chuff at 500ft on the climb-out. Had enough alt to do a turn-back and landed downwind (managed not to soil myself). Turned out fuel-filter was full of it, which no amount of fuel draining would cure.
Mr_B - rough mags are quite commonly down to mucky plugs. Can usually be cleared by agressive leaning and a decent ground run, then checking the mags again, usually clears it.
Last edited by Shunter; 2nd September 2007 at 19:37.
Reason: More info