One cylinder will not spark.

b.gagnon

b.gagnon

Master Chief Petty Officer
Joined
Apr 28, 2001
Messages
835
I have what I believe to be a 1988 8hp merc. The upper cylinder will not fire, so I swapped the coils and it still did not work. This leads me to believe the coils are good. I have checked all connections and they seem ok. Any ideas?????<br />One other question is, will this motor push a 12ft glass faster than a very early mod 10hp Johnson? and they seem ok. Any ideas????? :confused:
 
D

Down South

Petty Officer 1st Class
Joined
Aug 7, 2001
Messages
333
Re: One cylinder will not spark.

Have you checked the spark plug. It may be fouled.
 
b.gagnon

b.gagnon

Master Chief Petty Officer
Joined
Apr 28, 2001
Messages
835
Re: One cylinder will not spark.

The plugs are good...I was thinking that it could be the ign. box, but I don't know hot to test it.
 
T

trevorcday

Petty Officer 1st Class
Joined
Dec 2, 2001
Messages
216
Re: One cylinder will not spark.

It is either a bad switchbox or a bad trigger. There is a resistance test for the trigger. If that tests good then replace the switchbox. The switchbox is the most common cause.
 
You must log in or register to reply here.
Top