Zenith Carb

corethl@3rddoor.com

04/27/2001 04:50 PM

Bill,
Do I understand that the threads in the carb body for the bolt to hold
the top cover down are stripped out ? If so the threads are
5mm dia.X 0.9 pitch which are an obsolete combination. Today most
5mm dia. threads are .08 pitch and I have not seen a 0.9 pitch thread
repair kit ever !
I have repaired several stripped holes by using a Helicoil repair 5mm dia
X 0.8 pitch and used an old original bolt to chase the installed Helicoil threads,
lubricating liberally, this will stretch and re-seat the Helicoil to 0.9 thread pitch.
After all 0.1mm (.004") is not much to deform "monkey metal". I got the idea
from a guy at Stoddards some 15 years ago. So unless something has
changed on 0.9 pitch repair kit availability this is still the only cost effective
solution.
Questions on any details just e-mail me.
Larry Coreth
Roanoke Rapids, NC