79 50hrose

[davidhicks]

I have just picked up a 79 Thundercraft Titan ss with a 50hp merc outboard. The motor turns freely and has good compression but its not sparking. The 2 wires coming up out of the harness are carotid and the casing has fallen off them. I am assuming one wire is a hot wire off the magneto and the other is a ground.(these are the wires running to the coils) If i replace these wires i should get fire.
Now can any one tell me if i am assuming right or wrong on this one? Or does any one have a wiring diagram for a 79 4cy 50 merc outboard?

 

[achris]

Re: 79 50hrose

This diagram says 76-77-78, but the 79 is the same....

 

[davidhicks]

Re: 79 50hrose

Now is the wiring replaceable from the switchbox to the coils? or is the wiring sealed in to the switchbox?

 

[achris]

Re: 79 50hrose

Individual wires.... Merc used to sell them as a harness, part# 84-73446.

Just use a bit of green wire (with decent insulation) and hook them up...

 

[davidhicks]

Re: 79 50hrose

Good news i found a replacement harness through CDI ignition, (part# 934-8721) Now im just waiting for it to arrive.