I had the same problem on my Suffolk Punch 17S with the AQ148 (E-45520E). I fitted a complete aftermarket carburettor on eBay from GHS Part number - 6391. I set up mixture and idle as for a Tecumseh adjustable carb and it works a treat.
John Lines April 2017
That's a classis symptom of a lean fuel mixture. Since the carb is not adjustable, the jet must be partially blocked. A good carb service should sort it.
Confirm by slowly closing the choke, If there's a point at which it smooths out, diagnosis confirmed.
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Thanks...Click here for the fix.
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Thank you...Click here for the fix.
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