Engine from Kim

Two wen macs came in the mail today from Kim.  I tinkered around with the MkXIII. The piston and glow head was stuck big time and heat wouldnt budge it. I set it to the side till later and stuck a poor piston/cylinder set in along with my Mecoa adapter head for some fun. The plug is a Merlin 1\2a plug. I wasnt expecting any profound performance out of it, and didnt get any. This spare cylinder has poor compression. I ran a half oz. through it slow and rich. After a cool down I fired it up again and needled it up to a two stroke, she made 13020 rpm with a 6x3 prop and 10% fuel. It started easy and adjusted well.


Later I got some tools and removed the glow head from the original cylinder and drove the piston out with a punch. Man was it in there! I have two piston\rod assemblies coming from oldenginerod and I hope one of them will fit good so I can re-install the original cyl. back in. If I get a good fit she will go over 14000 rpm.