1987 Mercruiser 4cyl - no spark from ignition coil

FW0804

Seaman Apprentice
Joined
May 20, 2009
Messages
38
I have an '87 Four Winns with a Mercruiser 4cyl 165HP motor. The motor turns over but I am not getting a spark from the ignition coil. I tested the coil and I'm getting 12V to the + side but no spark from the ignition coil plug wire.

I have 3 wires going to the - side of the ignition coil.
GRAY - tachometer
BLACK - goes to distributor (connects internally to a condenser coil)
WHITE - goes to some type of switch on the other side of the engine. Safety mechanism? (this should have no effect on whether the coil sparks)

I have 2 wires going to the + side of the ignition coil.
YELLOW \ RED - goes to slave solenoid
PURPLE - goes to choke

It seems like I've tried everything, this ignition system seems very simple but I have to be overlooking something. Any suggestions?
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,480
Re: 1987 Mercruiser 4cyl - no spark from ignition coil

Are the points clean and properly adjusted
 
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