I eat my words,cleaned carby totally-drained fuel tank contents into a glass jar,good way to see if water is in the fuel(petrol floats on water)in my case 5 mills of water at the bottom with 40 mills of fuel on top-cleaned out tank and filled up with good fuel(91 octaine) half a pull and away it went,cut the back lawn running through the grass trying to stall the motor.very strong motor and cut beautifully so now i will chase up a catcher for it.these mowers are supprisingly heavy compared to 160 victas which im used to.not bad for free and 2 hours repair work...ken