On Sat, 20 Oct 2007 12:31:57 +0000 (UTC), Bertie the Bunyip
wrote:

snip

And I thought it was just my old model airplane engines and bikes that
had that feature. Who would have guessed a Lycoming could clamber to the
height of sophistication reached by Ohlsson and Rice?

Bertie

Been awhile since Continental spec'ed a choke bore, unsure if Lycoming
ever did (I've never come across one-does not mean it does not exist).

What is curious is that on the Conti's you could "straighten out" the
choke and be within service limits in most cases.

Factory new Lycoming cylinders can tend to be a little smaller at the
upper 1/4 of the bore, but that's because the head gets shrunk onto
the cylinder after it is initially machined & nitrided. Sorta
important to check min. ring gap up there when working with a new jug.

Again, it can be a straight bore and be within new & service limits.

TC