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Ignition Coil gap setting

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Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: Stuart on 00:39:30 11/07/12 Wed

I would like to check my coil gap and according to the manual this requires a non magnetic small sheet sized ten thousandths of an inch.

Please can someone give me tips on how to check the gap accurately and if any special technique or equipment is required to complete the check.

Thank you.
Anonymous
 

Re: Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: DL on 06:40:05 11/05/12 Mon

My special tool is a highly specialised carefully constructed high accuracy plastic business card that is around 11 thou thick. Took a while to find, but it is now part of my tool kit. You could also cut an old plastic milk bottle sheet which is around the same thickness and use that to set your coil gap.

The procedure is very simple. Place the card between the coil and the exciter on the flywheel, lightly tighten hex bolts,ensure that nothing is rubbing and torque up.
Anonymous
 

Re: Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: bluboyz on 12:39:26 11/05/12 Mon

Our special tool is cut to suit from a sheet of 10 thou brass shim. Available at bearing outlets, sometimes in a pack of different thicknesses, about 150 mm x 150 mm. Can be cut with scissors or similiar. Placed between coil and magnet and then tighten, be sure to check both ignition coil packs against all three fly wheel pole plate magnets for clearence.
Anonymous
 

Re: Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: DL on 07:32:51 11/06/12 Tue

I think you will find my special tool is far more widely available but as they say in china, there a many ways to skin a cat! :-)
Anonymous
 

Re: Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: Bob P on 10:59:29 11/05/12 Mon

The cover of my (November 2012) LAA mag is 5 thou thick, so 2 layers of that would do. (The paper wont compress providing it doesn't get wet).

There was a suggestion on this site to liberally "black" the magnets on the rotor (the bit that requires 10 thou clearance)with an indelible felt tip maker pen. You can then easily check if the gap ever reduces to zero - the die will be rubbed off.

Cheers

Bob
Anonymous
 

Re: Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: Mick on 18:15:41 11/06/12 Tue

Doesn't help identiying the gap getting bigger !
Anonymous
 

Re: Ignition Coil gap setting

Postby Anonymous » Tue Feb 10, 2015 9:57 pm

Posted by: Bob P on 00:39:30 11/07/12 Wed

A gap that is too big should be easily spotted from other symptoms eg the engine will not start - or stops during a mag check at slow idle.
Anonymous
 


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