Ok all, I have read numerous numerous threads, and I am now at my wits end with my Saito 91 inverted. Have spent a couple hours trying to get it to run at low end. Replaced stock plug with an OS type F. Tank is in line with carb. I have adjusted the low needle all the way till it was closed. And everywhere in between. It runs fine with plug attached. Once removed, depending on where I have the LSN adjusted, it will idle fine for between 5 and 30 seconds and then all of a sudden, it will just die. Not speed up, not gurgle just DEAD! This is the second Saito 91 engine for this plane,the old one ran perfectly till the bearings went out. I needed another engine quicker than the rebuild would have been. Any tips on the newer engine will be appreciated. Thanks in advance!