RE: 21cc Echo timing?
As stated earlier,i buy mine from topcat01,you can also check:
ch-ignitions
rcignitions
wackerengines
indiannatinygasengines
my buddy-j.romine who sells here on rcu and does conversions
My self,i have a 6 bolt hub for an echo laying around,i also have a lathe if ya need somthing
The thread size is 8x1.25.
Ill see if i can find anymore off hand.I know the G23-26 is 1.2 but i dont know if there 1.25.Ask Ralph at rcignitions.