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MG Midget and Sprite Technical - rotor arms failing

My standard 1275 midget kills rotor arms !After a couple of hundred miles the car dies & cause is a defective rotor arm . Testing shows current tracking down through the arm . A new arm cures the problem every time . Ive used different sources for the new arms but it still happens .
Any ideas ???
r hayden

Spark plug gap to wide with electronic ignition. (That was my problem)

Flip




Flip Brühl 948 frog 59

Yes, contact Advanced Distributors and get two of their new high quality rotors shipped over to you. http://www.advanceddistributors.com/ Jeff has an improved material and design for the rotors that eliminates the carbon tracking and poor connections.


Bill Young

There are a lot of cheap spurious rotor arms around - I buy from The Electrical Parts Co Ltd from Tenbury wells at 01584 811118 / website www.theelectricalpartscompanyltd.com who supply rotor arms / points / condensers to Lucas quality - I have not had a problem since fitting them
John M Platt

I had same problem when I opened plug gap to 35-40 thou as suggested to use with ignitor. Rotor arm should last longer with 25-30 thou max.

A
Anthony Cutler

'Standard' rotor arms made today are made of a mix that, apparantly, is more conductive than of old. That combined with a longer rivet causes a short between the end of the rivet and the dizzy spindle.
Aldon Automotive or Distributor Doctor sell rotors that are supposed to eliminate the problem. depending upon what type of electronic ignition you fit then a rotor arm will still be required unless going to mega jolt or similar.
Alan Anstead

see: http://www.123ignition.nl/brand/MG.html

This 123 ignition (€299,- it is Dutch) cured the rotor problem and all my other ignition problems.

Flip


Flip Brühl 948 frog 59

find an old original one at the back of your tool box and fit that lol

gordon
g c pugh

This thread was discussed between 31/03/2009 and 04/04/2009

MG Midget and Sprite Technical index

This thread is from the archive. The Live MG Midget and Sprite Technical BBS is active now.