Well, it looks like I might need to revive a thread from the dead... I just acquired a Enya 19 IV today that was given to me after being found in an old barn of all places, along with a bunch of other stuff. When I got it this engine it was frozen solid, but otherwise looked to be in pretty good shape. So I went to work on it, got it free'd up, mounted it on the bench, and what do you know but it runs pretty good! The only concern that I have is that the rod seems to be still frozen to the wrist pin and the pin is turning in the piston itself instead of the rod rotating on the pin. I do not see any kind of a wrist pin circlip either? I have read where some of these engine have brass inserts on either side of the wrist pin to keep it place, but I do not know if the .19 IV has this or not.

Right now I can move the rod/wrist pin back and forth in the piston, but as I said the pin moves and rotates with the rod. If I move it to either side of the piston the wrist pin will protrude about .5mm one way, or 1mm the other. Do I need to soak the piston/wrist pin/rod to get the wrist pin free? And should there be circlips keeping the wrist pin located? As of right now I think my intentions are to build a period correct r/c airframe like a sig seniorita or a Goldberg falcon 56 or similar for it to go in. I believe a M153 strap on muffler will work with it as well since I will need a muffler to fly it at our field.

I hate to revive a 7 year old thread, but it is all about the Enya 19's. Thanks for any help!