New coil, leads, distributor cap ... and OUCH! ZAP!

Hi everybody,
On the weekend I put a new coil, distributor cap and leads on my 1951 TED20 in an attempt to get better spark. It seemed to work and the thing started up first go, but it was not running well. Before looking at timing I decided to do the old "pull the leads off one by one" trick to determine if any of the plugs was not firing.

I grabbed the first one, and as well as noticing the predictable drop in idle quality, received a big ZAP zap zappity OUCH! I was getting zapped by the lead in my hand. I have never had this before (on this tractor) and I have pulled leads a lot of times. Is it something to do with the type of the new leads I have? For the first time I bought the screw-in ones with the 90 degree caps at the plug end.

I was holding the plastic cap with some of my fingers resting against the flexible part of the lead. Should I have just grabbed the plastic caps and not the lead? Why am I getting zapped?!?!

- TS
 
You were getting zapped because the HT was leaking through the insulation on the leads. next time use a good pair of insulated pliers to hold the HT leads and you shouldn't feel anything. This engine needs to have the correct plugs and have them gapped correctly or it will run roughly, the same applies to the points and they vary if it is a 6v or a 12v model. If you need more info, email me at:- [email protected]
 
Yes, thanks John(UK).
I guess my new leads are not as well insulated as my previous ones (or perhaps the new coil is causing a much higher current!). The parks plugs are also new and have the correct gap.

Thanks for the advice about insulated pliers. Getting electrocuted is not much fun!

- TS
 

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