Hello Chesh and Millzy
The symptoms you describe suggest a carby overhaul is needed.
Setting the carby is the first step in diagnosis.
Next step - carby overhaul and re-set as per Millzy's advice.
All the basic checks should be carried out first -
compression, spark, fuel ...
The initial suspect - after the basics - lies with fuel.
Please tell us how you go.
Many thanks to Millzy for the link.
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Jack
