Can someone please confirm that the Zenith 63L is the proper carb for this unit. I have a guy out near State College, PA who has a little ma & pa engine shop. He specializes in vintage engines and has found engine parts and carbs that were 50+years old and were new in their original boxes. He makes his living buying up old engine parts stocks from places going out of business. If I have good info on the carb, I'll visit him the next time I'm visiting my Grandkids out there and get a new one if possible before FWW.