RE: 63.bubbles in carb line
I have recommended here in the past NOT to buy used YS engines unless they have been inspected by our service dept. or the prospective new owner sees the engine run to his satisfaction.
At this point I would send the engine in to our service dept. for inspection.
YS Service
1295 Industrial Court
Gardnerville, NV 89410
Phonje 775-782-4562