YS 61 R Problems
What is a 61L? YS has never made one of these to my knowledge.
You may have damaged the regulator by turning the screw all the way in. Your problem sounds like a leaking regulator plunger, but we cannot tell without seeing the engine.
You might be better to send it in to us for an inspection. The service dept. address is:
YS Service
1295-C Industrial Court
Gardnerville, NV 89410
Phone:775-782-4562
Thank You,
Dave