Bung up the breather with a soft wood bung and pump like buggerie, should create enuf pressure to blow out the cack.
Reminds me of some advice for the elderly...
at your age three things to remember
1. Never walk past a pissoir
2. Never waste an errection
and,3. Never trust a fart.
[ QUOTE ]
Bung up the breather with a soft wood bung and pump like buggerie, should create enuf pressure to blow out the cack.
[/ QUOTE ]
Did exactly this with a stuffed holding tank in a Bav 50 between Mallorca and Menorca. The tank cleared with one hell of a bang, and the sea turned putrid brown for about 500 yards around us. Bloody good fun, but only after the engineer had agreed that if it exploded inboard, he would clear up!