Originally Posted by
rattman
Theres whole youtube channels on it, I believe one of the best things for screwing an engine was bleach into the oil
Hand grenade with rubber bands in the fuel tank works wonders I'm told.
A low cost alternative is a cellotape ball in the fuel tank. The petrol dissolves the glue leaving a small section of cellophane ready to block the inlet. If you take the tank off to flush the tape tends to cling to the side.
It's really annoying and causes random failures that are hard to diagnose. Ask me how I know!