another post prompts me to mention the dangers of explosions from petrol vapour, which is lots more dangerous than liquid petrol

dont have any type of electric heater in the garage or shed, if working on the fuel system

also always look for any gas water heater there as these have a pilot light and have caused many garage explosions and fires
also wash things in kero or mineral turps rather than petrol
remember that metho is as dangerous as petrol, even if you dont drink it