I'm upgrading one mag to a P-mag and need to swap the tach pickup to the left mag. Since the plug was hard to get too I decided to remove the mag and do a 500-hr inspection IAW L-1367F.
All looked good but there is obvious contact happening between the electrode towers and the electrode finger on the distributor gear. The electrode finger on the distributor gear is not loose and there's no signs of cracking in the gear. Also, there's no cracking in the distributor block. There is, however, some slight play in the gear when assembled in the distributor block, which leads me to believe the olite bearings are worn.
Does anyone know if contact between the gear electrode and the distributor towers is cause for replacement? The overhaul manual is vague...
"Inspect the brass electrode posts for signs of physical wear. Replace block assembly as necessary."
Manual says bearing should be 0.246 +.002/-.001 so I'm checking that next.