While you wait for answers, we may have found some information which could help you.
Click here for Where Lawnmower BoxSpare or repair for Challenge Xtreme electric mower grassbox?
fuelcap?
Where is air filter on challenge extreme 30cc strimmer ?
How do I set up the carburettor on a Challenge Extreme Petrol Push Mower?
Challenge lawnmower ?
my challenge xtreme mower ?