Hi Jezza555, and a warm welcome to the forum. It's great to have you aboard.
I have moved your post to the correct forum.
A link to the Owner's/Operators Manual can be found
HERE The Specifications of your machine are:
DISPLACEMENT: 20 cc
OUTPUT: 0.7 kW
DRY WEIGHT: 4.7 kg
CARBURETTOR :Diaphragm Type
FUEL CAPACITY: 450 ml
FUEL 50:1 RATIO: Two-cycle Oil mix 25:1 ratio
Hopefully one of our 2 Stroke gurus will chime in here and give you some advice as to a plan of attack.

Once again,

to OutdoorKing.