78 mercury 115 no fire

jstrawser

Cadet
Joined
May 12, 2009
Messages
8
i have a 78 mercury 115 was running fine , all at once it died. i am not getting any spark at the plugs. where do i start?
 

honda450

Recruit
Joined
May 31, 2009
Messages
5
Re: 78 mercury 115 no fire

I would first ask what type of system it has on it. Make sure that if it has a landyard that it hasn't came off or the cap not holding the button in anymore.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,036
Re: 78 mercury 115 no fire

A 1978 Merc 115 has a battery driven CDI Ignition systems with a distributor. the first test is to make sure you have +12V on the red and white wires on the starboard side of the switchbox, when the ign key is turned on. No voltage=no spark. if that checks, look up the troubleshooting procedure at the CDI Electronics website.
 
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