3, 4 and 6 not firing

macdaddy

Cadet
Joined
Dec 31, 2001
Messages
26
All the rest have good blue spark checked with a spark checker set at 7/16".

I have searched this site and found some good info.

My question is I have read on here to check voltage at the switch box, how?
If it is the switch box, which one there are two and 2 of the coils go to one and the other one goes to the other, is both boxes bad or is the stator bad?

The engine is a 1981 inline 6 merc 90 hp
 
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