How to assemble ignition coil

BonairII

Commander
Joined
Jun 7, 2011
Messages
2,727
I've ordered new coils for my 1977 Evinrude 75hp. I should be able to terminate the plug wire to the spring, but I see that I've got to attach the wire to the coil also...how do I do that?

I tried to take apart my existing coil to figure it out, but it's permanently sealed in the coil.

This is what the coil looks like ( i didnt buy from the site below, but the coil is the same)
http://www.marineengine.com/newparts/part_details.php?pnum=OMC0502886&ptype=&Engine=&Model=
 

Tim Frank

Vice Admiral
Joined
Jul 29, 2008
Messages
5,346
Re: How to assemble ignition coil

The coil wire actually "threads" onto a post in the centre of the coil housing recess.
The old one should "unscrew" if you turn it CCW.

That's how I've done it with every OMC coil i have changed out. No doubt yours will be the only one that is different, and I've just given you 100% bad advice....:eek:;)
 

CatfishMN

Petty Officer 2nd Class
Joined
Jun 14, 2009
Messages
170
Re: How to assemble ignition coil

Yep, what Tim said. Look into that hole and you will see a screw, and it is pretty self explanatory from there. Getting that spring secured to the wire properly and into the boot can be a real treat too!
 

danray35e

Petty Officer 3rd Class
Joined
Jun 30, 2010
Messages
86
Re: How to assemble ignition coil

I just got the same kit. I understand about screwing the wire into the hole but what do I do with the spring?
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: How to assemble ignition coil

The rubber boot, spark plug end.... With the wire cut to the length required, trim back 1/4" insulation again but do not solder tint the wires. Simply fan out the wires and fold them back against the insulation, cutting the excess off as explained above. Holding the spring wire terminal, estimate where the prong should be inserted so that the spring will be flush against the exposed wire. Hold the spring terminal away from the wires end (sideways) and insert the prong into the insulation and into the center wire, then swing the spring terminal in front of the exposed wire portion (makes a tight fit for continuity purposes).

Spraying the inner portion of the boot where the wire will insert with a small amount of WD40 makes the installation of the wire a easy project. That's it.... you're done.
 
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