Re: Old dog DID NOT learn any new tricks!! LOL

Posted by John T on July 03, 2016 at 06:40:45 from (216.249.81.101):

In Reply to: Old dog DID NOT learn any new tricks!! LOL posted by JD Seller on July 02, 2016 at 21:09:21:

Mornin JD, Happy Fouth of July Hey were never too old to learn right?

I will answer your questions but NOT open a can of worms ad get into the whole EI versus original debate as thats NOT your question.

QUESTION

1) It has one of those yellow coils on it.

Some of those are after market high energy high voltage coils that draw "might" more then the 4 amps points handle well but "most" (subject to switch current rating) elec switches can handle no problem. The ability to use a high voltage high energy coil (draws more current then stock coil) is one reason the EI is used in first place plus many gents then run a wider spark plug gap yielding a higher energy (volts x amps x time) high heat arc producing discharge over a wider plug gap distance to ignite the fuel.

2) QUESTION

Do any of you know if I have to use the electronic ignition manufacture's coil???

NO you could use the stock coil as the elec switch "probably" no warranty however, has plenty of current capacity

3) QUESTION

"can I just use a regular coil??" YES see above

HERES THE DEAL an elec switch mfgr bases his coil recommendations on the switches current switching and carrying capacity SOOOOOOOOO he sure wouldnt recommend a coil that draws too much current for the switch to handle WELL DUH and while the switch can handle the current most stock coils draw THAT WONT YIELD YOU THE MOST BANG FOR THE BUCK AN ELEC SYSTEM HAS TO OFFER so they will prob recommend a matched high energy high voltge coil the switch can handle so you end up with a higher energy ignition and you will be happier with improved performance. NOTE the firing voltage depends on the plug gap and medium (compression and fuel) so an HV coil wont fire any higher then a stock, its just that a HV coil has the CAPACITY to achieve higher voltage if required, but thats harder on wires and caps n rotors !!!!!!!!!!!!

SOOOOOOOOOO while you can use the stock coil (give a stock coil a try to see if your "yellow" coil is bad), the EI mfgr may recommend a high energy high voltage (as needed to fire a spark across a wider gap) BUT REST ASSURED IT WILL BE ONE THAT MATCHES THE SWITCH so its current isnt exceeeded.

QUESTION

The reason I am asking I do not want to harm the electronic system with the wrong coil but I am not sure that the coil is the trouble.

GOOD THINKING if you used a coil that draws more current then the elec switch can handle POOF but "many" elec switches can handle "many" of the higher energy after market coils THATS WHY YOU SHOULD USE A COIL THE MFGR RECOMMENDS AND NOTTTTTTTTTTTT someone here (including me) DOES.

CLOSING THOUGHTS AND ANALYSIS

A) PLUG WIRES: Often an EI user will run a wider plug gap which increases firing voltage so you need good quality HV rated plug wires, be they resistive suppressor carbon core or wire core. HOWEVER I believe some of those switches which use a HV coil with wider plug gaps may prefer a certain degree of IMPEDANCE in the plug wires and may use spiral wound plug wires and if the selected switch and coil is best with those specific plug wires THEN USE THEM. Carbon core suppressor plug wires reduce radio interference as opposed to straight wire core, but the Elec switch has plenty of energy to spare so if regular carbon core (NOT spiral wound wire) wires are used thats genarally not a problem nor are wire core UNLESS the whole system works best with spiral wound.

B) COIL generally speaking the coil is NOT my first suspect when there are ignition problems, usually its the points or condensor (in old systems) or the spark plugs or plug wires or cap n rotor and that "yellow coil" MSD or ACCEL??? is prob as good or better quality then the stock.

C) ARE YOU RUNNING A WIDER THEN STOCK PLUG GAP (say 0.035 to 0.060 even) ??????????????????? If so thats a strain on stock cap n rotor n plug wires so Id be looking for HV breakdown evidence or carbon traces or hairline cracks in the cap and Ive seens rotor tips suffer HV breakdown when running wide plug gaps and HV coils etc. Try to find a real dark place tonight and ruin her and see if theres any arcing going on???????????

D) FINAL THOUGHTS Sure an elec switch can fail and I cant tell if thats your problem or not. I would however FIRST suspect plugs or plug wires or cap n rotor or spark advance mechanical issues and then perhaps the coil or switch itself. Does the plate upon which the magnetic rotor assembly (where points used to mount) feel smooth n even and rotate back n forth????????????????????? YOU COULD HAVE A MECHANICAL ADVANCE ISSUE...........OR BADLY WORN BUSHINGS AND BEARINGS IN THE DISTRIBUTOR.............. TRY HER WITH ANOTHER STOCK COIL AND SEE WHAT HAPPENS as most elec switches have far more capacity then a typical stock coil draws but I wouldnt hang on just any high energy HV coil like an MSD or Accel etc that may exceed the elec switches capacity. Is the air gap between the magnetic rotor and pickup coil in the distributor correct and all well attached??? Probably is and is fixed mounted but I cant say from here.

Youre a good hand to help folks with general and farming questions where youre experienced, so its fun to help you in return in areas where I have at least some degree of expertise. I tried to educate you on the hazards of electrocution (per OSHA and the NEC) driving an earth ground rod might cause when using portable gensets wired and configured in certain ways, and now hopefully help you understand the basics of elec ignitions, youre a good teacher as well as a good student.

Happy Fourth of July and God Bless you and God Bless the USA

John T Tooooooooo long retired Electrical Engineer and rusty on all this SO NO WARRANTY I may be wrong as rain!!!

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