Hey Guy's!

Just got back from the field. I forgot how much fun flying with ski's was! I must have had about 30 or 40 take off's and landings. The mid range felt sloppy, no matter what I did. For regular flying, the engine was fine. I was actually impressed. Rolls, loops, vertical climb's, out of site. I mean litterally, straight up, out of site. No more full throttle flameouts! I was thinking the slightly ritch midrange may have been due to the cold. I decided to do some hovering before calling it quits. The engine could not transition in a hover. It would try to die. If I throttled back, and got back on the low needle, the engine would stay running. I couldn't make sense out of it, so I went up to the hobby shop to talk to the owner. He said it sounded like it was transferring from the low speed needle to the high speed needle too early. As we studied what I did to the carb, to align the hole, we realized that not seating the spray bar(brass insert), changes the transition point. It does cause it to go on the high speed needle early. So, in short, it appears that I did prove the turbulance theory. Yes, I did change the o-ring at the base of the carb, but I don't think that was a factor. We looked at a GMS .47 that he had in the case, and the hole in the spray bar was properly aligned in that one. To truly make our engines run properly, I recommend spending the $8.00 for the new carb body from Tower or your LHS. I am still hoping MECOA surprises and impresses everyone, by contacting me back, or answering us in this forum, and somehow making this right. If they even just made new spray bars available to us,... Well, that is my report. I feel confident this is right. I guess I can prove it further, by putting my spray bar in my friends carb. I'll have to see if time allows it.

By the way, Perry doesn't make a carb that fits the GMS properly. I have one that is close, but a little tight going in. The biggest problem is the length of the throat. It is too long, and won't allow the carb body to compress the top o-ring. If you had a machine shop, and could turn it down, it would probably work.

Andy

Andy