Kmot,
Nope, I dont run a fuel filter.

Mitty,
Idle is adjusted from almost richest setting (where it will not run) and leaned out 1/8 turn at a time so I can remove the glow starter and idle rpm does not change. I have also leaned it out to where it has zero smoke trail 0-3/4 throttle travel. So far my best results found was only a fraction from the factory 1 1/2 turns out.

5_spot,
yes, I adjusted the high end rpm so as to hear slight rpm increase when tilting it 45 degree+ angle. I did not perform this check at low end, as I used the method fore mentioned for adjusting idle & low end rpm. I will also try this. Thx

bigchap,
Your not this first Ive heard say this, and have had individuals tell me they have never had an engine they couldn't tune in 15 minutes, that it was all in the needle valve adjustment. As I would take someone up on this but as I said, it works like a charm on the ground... atleast long enough to look like an idiot when its running right for 5-10 minutes and be told... look theres nothing wrong with it, but I dare ya to strap it to your firewall for a week and come back tell me theres nothing wrong with it.

In conclusion, with a motor that has been well noted for air leaks has failed the QA at the factory level with many unhappy consumers, who is to say that the rest of it is any better. I do know for a fact that there are GMS 47's that run just fine. Just not Mine.