MCCULLOCH PRO 10-10 - bogs down when full throttle

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louie3888

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Woulld anyone know what would cause my Pro 10-10 when I pull the trigger fast the saw bogs down and want to cut off. However, if i gradulally bring up the throttle it runs fine at full speed. It only does this with a quick trigger pull. It as a new tank gasket, fuel line, carb kit, carb adjustment/cleaning (Walbro SDC-37a), good ignition, 135lbs of compression, impluse port looks clean and intake and carb base new gaskets. Starts on first pull, just stuggling to determine what else might be wrong. Also, do not see any air leaks or changes when I check with some brake cleaner. Any thoughts on what might be wrong? Thank you.
 

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