My 63 has an idle problem. The top end seems fine but when I throttle down it starts off idling fine but then bubbles quickly appear in the
carb line and naturally the idle starts to lean and speeds up and gets unstable....The bubbles show up with rich and lean low end settings.
I bought this engine second hand with about 6 gallons threw it and I'm new to Ys engines...A little advice would be great.

thanks

xanaphyst