1977 Mercury inline 1150 distributor trigger broken again

tavacska

Petty Officer 1st Class
Joined
Jan 21, 2017
Messages
247
I bought a CDI 3736 distributor just 2 years ago and passed the warranty now.
It broken again. The switch + coil have been tested to spark good.
The brown port of the switch is 12+ v when not connected with trigger; becoming 8.75 v when connected with trigger. This is exactly the same situation that happened two years ago when I replaced it.

What can cause this problem? Is this CDI's fault or my mis-operation?
 
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