Posted by RonM on 6/27/2012, 11:27 am, in reply to "Re: coil restistance"
94.192.96.114
When I aquired my '78 T140 in 2000 I had reason to investigate the ignition system and found that 12v coils were fitted.these measured 3.8 ohms primary and 7.1K ohms secy,a turns ratio of 1868:1.
I fitted 6v coils as per the manual,these measured
1.9 ohms primary and 8.2K ohms secy,turns ratio of 4315:1.The 6v coils will deliver more energy during the time the plug fires collapsing the secondary field of the coil.I must say that having changed to the 6v coils I did not notice any difference in performance.
The info you gave did not say which coils are fitted.
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