Thanks WCE Unfortunately I've only got a small shed so will have to keep it under control :) I'll buy a new spark plug next week and change the fuel and give a try. Previous spark plug was in the port a bit sloppy so the previous owner must have played around with it but I can see its old so hasn't replaced it. I reckon a bit of rain could have got down the air filter snorkel thing on the push bars as it might have been stored outside in the rain and the cover is missing off the air filter snorkel thing so some water could have drained down. Do you know where you can buy one of these covers from ? I've seen the air filter on ebay etc but not the cover. Yes when you put your hand over the spark plug port with the plug removed it makes a nice whooshing breeze when you pull the starter. Do you bother to use a compression tester ? If so what one do you have ? Do you really need it ? Thanks