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McCulloch MH542P hedge trimmer trouble starting? ?

When the unit is started with the choke in the correct position it runs for about 6-10 seconds then cuts out.
The moment I try to adjust the choke lever or the triger lever to use the machine it cuts out.Have tried a new spark plug, cleaned the fuel strainer,air filter and have tried different mixture strengths.Any suggestions?
John, November 2008
Probably carb needs a new diaphragm.

phil_saunders@bigfoot.com

Phil Saunders, February 2009
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