KF2 Plug leads

[A10 JWO]

My old 1954 A10 runs but I have noticed that the odd plug leads are quite old and appear to be copper. some old wise a10 people at the jumble suggest that I replace them with carbon leads that have less resistence. Can the  forum chaps offer me some good advice on these tired old leads and where to get them. I don't intend to scrimp on these important parts.

Regards Colin

[a10 gf]

replace them with carbon leads that have less resistence

I've always believed it's the copper ones that are right for a magneto, and will have the minimum resistance !??

[stu.andrews]

Stick to copper, carbon breaks up with age.

[metalflake11]

Copper leads all the way. No doubt.

[Triton Thrasher]

You meet some right idiots at auto jumbles!

The whole point of carbon leads is very high resistance, for suppression of interference with radios, etc. Their resistance can be too high for old magnetos.

If your present HT bits are not failing to spark or giving you shocks in wet weather, they're fine.

[KenF]

I completely agree with all the other responses, Colin. The 'old wise A10 people' at the jumble got it the wrong way round.

Carbon leads and/or suppressed plug caps and/or resistive sparking plugs make the magneto work harder and suffer more to produce a degraded spark.

We did some experiments a while back. See http://brightsparkmagnetos.com/faqs/FAQs%20about%20magnetos%20generally/Are%20suppressors%20and%20resistor%20sparking%20plugs%20OK%20to%20use%20with%20magnetos.htm

Ken
www.brightsparkmagnetos.com