OK. So I got out my old stash of Cox engines and
parts. The good stuff came from Santa Ana California.
The crummy stuff came from Corona California. (Warner
was the name of the road in Santa Ana where they
were located prior to moving to Corona).

The Tee Dee .09 had a neck at the base of the cylinder,
as did the reed valve .049's, but the Tee Dee 049 did not.

The way to tell a good cylinder/piston set is that when
the piston is pushed up into the cylinder, it can come
part way (maybe half) out the top before it gets too
tight. The crummy ones may go farther or all the
way out the top. Occasionally one would not go
out the top at all or just a smidgen out. These could
be mixed an matched to get at least one better
performing engine.

On the earlier engines there were ladies who did
this matching in the factory, so you always got
a good set. After moving to Corona, they stopped
doing this. I believe Kustom Kraftmanship would
buy lots of parts and do this matching, so what
you got from them was still good.

Some time after the Santa Ana days, parts bags
had a square Cox logo and the address on the
back was for Leisure Dynamics in Minnesota.
These parts were questionable, some good,
some crummy. Some had poorly matched
cylinders, some had crankcases assemblies
with the drive plate pressed on crooked, etc.

As far as I know, all the blister packs were
good stuff from Santa Anna, but I'm not
sure about the really REALLY early stuff.
The clear plastic boxed engines were also
really good.

Jenny