Thanks Mark, it is a good running engine even with the bearings growling it out performed the Saito 100 for some reason?? Should run a lot better now without the bearings fighting it.
Short story on the Magnum is it was a 4th or 5th hand me down that belonged to one of my students in a 60 no name trainer. It has always run but never run very well, even under powered for a Magnum. Another student bought the plane complete. The carb low end needle is out 9 turns, always has been and it can not be adjusted, one little touch from what we will call the sweet spot and it dies. My friend rebuilt the engine completely, I went through the carb and installed all new O-rings, the carb has been gone through several times by now and nothing seems to be of any help. I can tune it to keep it running and fly the plane but it isn't right or correct, one click either way on the high end results in a dead stick. I had it running pretty well here in Vegas but the owner took it to Utah and it wouldn't run at all there. I talked him through the tune on the phone and he managed to get in a few flights so it's running again. You also have to tune it backwards, low end first then the high end, very gently a little at a time through the mid range until it will transition.
I have parts all over the shop but nothing for a Magnum but I would like to try another carb. I plan on using this plane and engine this winter for training but would hate to put a student on the box the way this one runs. I have no idea about the history of this engine, what another owner has done or if the engine was crashed in some odd ball way but I'm sure a new carb would be the answer.
That's the short story, there is more but you get the idea. I have a bunch of engines under the bench but nothing but a couple of MDS engines in 60s so I want to stay with this Magnum.
Gene