Howdy,
McCulloch used both Walbro and Tillitson carburetors branded McCulloch. Way back when they tried to make carburetors themselves. For these, there may very well not be any parts available. To determine what carb you have, I would take it to a good serivicing dealer, preferably one who employs an old McCulloch mechanic. At a glance, he should tell you what carb kit works. Be sure to keep record of it!
Regards,
Walt Galer
