Hey Tom
I have the OS 91 Surpass II pumped and I really like it. It started the first time I tried it new out of the box. I just followed the instructions, and I couldn't believe how easy it started. Actually, I didn't know it was running because my starter made more noise than the exhaust. It is my only 4 stroke and starts easier than anything else I have. I really like the pump system because fuel pressure is constant regardless of the plane's attitude.
RWCherry
Mt Sterling KY