Intermittent spark to my 1975 Johnson 15 horse

J

Justbcul2me

Recruit
Joined
Aug 19, 2012
Messages
5
I am not getting full spark to cylinder #2. I have checked the coil and it's reading that it's bad. I pulled off the flywheel and checked the points. Cleaned them. The number 1 cylinder is working properly. Starts good but no spark. I took out the spark plug and set it against the engine. Very faint and sometimes non existent.
 
B

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: Intermittent spark to my 1975 Johnson 15 horse

So.....What is your question if the coil is bad ??
 
D

Daviet

Fleet Admiral
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Sep 24, 2008
Messages
8,958
Re: Intermittent spark to my 1975 Johnson 15 horse

If in doubt, swap coils between the cylinders, if the no spark moves you know you have a bad coil.
 
J

Justbcul2me

Recruit
Joined
Aug 19, 2012
Messages
5
Re: Intermittent spark to my 1975 Johnson 15 horse

Daviet said:
If in doubt, swap coils between the cylinders, if the no spark moves you know you have a bad coil.
Click to expand...

So can I just swap the plug wires and the wires to the points and condensors?
 
D

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: Intermittent spark to my 1975 Johnson 15 horse

Haven't you got external coils mounted on the block?
Just remove both coils and swap the position of the coils, top to bottom and bottom to top. I the no spark moves, replace that coil.
No need to pull the flywheel at this point.
 
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