Mustangherb; I have been running my FG20 in my TF Spitfire since 2010 and it runs very well and sounds awesome. I love my Saito's, FG20, FG36, FG60R3 and my FA100. I have never had a problem with the FG20 since HH sent me a replacement carburetor in 2010. Your FG20 may have the old carburetor, the one that was a problem until they replaced it free of charge to customers back then. Check the part number on the carburetor, if it's not part number SAIG20821A than it's the problem carburetor you have on your FG20. Just for your info, HH has carburetor SAIG20821A in stock.
Roger