I found pretty much the same problems with my Excelleron 90 and it's inverted OS 1.20. You just can't get to the carb to choke it off to get fuel running, then once you do get it running, then you chance on loading the thing up with fuel. But, in this case, the OS 1.20 starts easy and runs well, so I probably figured out the best method of getting it started. One big thing is to make sure you keep the throttle closed all the way until you are ready to start the engine or you will find that your fuel will run all over the place.

Tank positioning becomes a problem... needs to be centered on the center line of the carb. Pain in the butt because many planes have you put the tank in a pre-determined spot which makes it tough to relocate (up or down).

I had an Evolution 100 in that plane when I first got it built. That engine was a nightmare to get started and keep running. It was so darned tempermental with tank position. That's when I invested in the OS 1.20 and most... most... of my troubles went away. It's still a bit of a pain but it does start and run much better than the 100 did.

To help alleviate the problem of the glow starter, consider putting in an on-board glow driver.

http://www2.towerhobbies.com/cgi-bin...&I=LXDZ82&P=ML

This is an example of what I am talking about. Not cheap at $42.00 but it will certainly do the job.

DS.