Remove air filter cover. Remove carburettor cover (one bolt). Remove filter backing plate (if the engine is primer start, you WILL need a new gasket to re-fit it).
Unscrew the 2 retaining nuts that hold the carburettor on, and remove it, unhooking the govenor control as you go. You may need to remove some plastic covers to improve access.
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Phil Saunders, September 2009