No spark on bottom cylinder

Castellina

Seaman
Joined
Nov 23, 2012
Messages
52
Hello, I am having trouble getting spark on the bottom cylinder. I think it may have something to do with the vacuum cut out switch or the mercury switch? The engine is a 1957 Johnson seahorse 35 hp. Rde19.
Thanks
 

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
12,944
Re: No spark on bottom cylinder

remove the vacumn switch from the curcuit and see if it makes a difference. I don't recall a mercury switch on my dads 57 Bigtwin. What shape are the points, coils, condenser, and wire in?
 

SumDumGuy

Petty Officer 2nd Class
Joined
Jun 21, 2013
Messages
126
Re: No spark on bottom cylinder

The mercury switch will not disable a cylinder (unless it is wired very strangely).
 

Castellina

Seaman
Joined
Nov 23, 2012
Messages
52
Re: No spark on bottom cylinder

It didnt make any difference. Now I have no spark in the top cylinder or the bottom. I have no idea what to do now. I don't know why the spark just went away in the top cylinder. It's kinda weird. Thanks
 
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