High output coil

Does anyone know where one could purchase a high output 6 volt coil for a cockshutt 40 I havent had any luck on line!!

Thanks in advance!!

Once upon a time 40-50 years ago the "Bosch Blue" coil was desirable. Do a search.

The factory coil if supplied with a #12 wiring from the generator to the coil. And with the voltage regulator dialed up to 7.0V will do just fine.
That 6V coil will fire any compression ratio you can cram into that Budda with the low rpms and only four cylinders.
Running solid core wires and non resistor plugs will help too.
Make certain the coil polarity is correct. They are often installed backwards which weakens the spark.

What you refer to as a "high output coil" will fire at the same voltage as the old stock coil given the same fuel and compression. Just cuz a so called high voltage coil has the CAPACITY to rise to a higher voltage, dont mean it does so given the same conditions. The plugs firing voltage is a function of the plug gap and the medium (fuel and compression) in which it fires. If compression rises it indeed takes more voltage to fire the same gap distance and its in those real high compression engines where a higher voltage capable coil might become necessary.

Its when you couple up an electronic current switch with a high energy high voltage coil and run a wider plug gap you can realize a wider fatter hotter higher energy discharge spark.

You might see if Pertronix has a high energy 6 volt coil......

John T

If you had a high output coil, you could run more gap on the plugs which would foul less.
Just keep looking cause there are guys that run high output on 6vt dune buggys and such.

Youre right, it might?? foul less BUT ONLY FOR A WHILE UNTIL THE POINTS BURNED UP (thats if you increase the current draw). Points can switch around 4 amps (and still have a decent lifespan) or so but if you increase the coil current by using a high energy coil that draws more amps, they will burn up quicker. Thats why its best to use an electronic switch which can handle more amps then points were designed for and when its matched with a high energy high voltage coil and a wider plug gap is used THEN YOU GET THE REAL ADVANTAGE and get all the bang for the buck an elec switch and high energy coil have to offer....... Sure one can widen the plug gap with a stock coil and perhaps gain some improvement, but the laws of physics and conservation of energy apply and theres only a fixed finite amount of energy stored in the coil during its conduction cycle and thats alllllllll (less heat losses) the energy available for discharge across the plug gap. Therefore, if you widen the plug gap increrasing the firing voltage, then either current or the arc duration time decreases since the energy discharged is volts x amps x time..

Dont get me wrong THERES NO HARM in running a high voltage coil if it doesnt draw much more current then the points were designed to switch although it still fires at the same voltage as the stock coil if compression and gap remains the same. Its just that if you use coils that draw more amps the points will burn up prematurely

BAD AS WE ALL WANT THERES NO FREE LUNCH LOL

Yall take care now n God Bless

John T

There's no free lunch. Ultimately, you're limited by what the weakest point in your system can handle, which is the points. I believe the "high output" coils have a higher than standard inductance, which gives greater spark energy at the expense of reduced point life. These are probably OK with a dual-point distributor on a high-revving engine, but neither necessary nor desirable on your tractor.

Why do you think you need a hotter coil in the first place? It sounds like you're trying to bandaid-fix some other problem.

By the way, most 12 volt coils are really six volt coils. Unless the coil is marked "no external resistor", they're all the same.

Exactly, John.

It's no wonder that OEMs abandoned breaker point ignition 30 years ago, once solid-state switches had evolved to the point that they could be used to switch inductive loads.

Back in the day, the Mallory dual-point distributor was state-of-the-art. I see you can still buy them, but the stock OEM electronic ignition is better in every way: More energy, more voltage, better reliability.

Well thanks guys for all the info,that is my idea Iam running electronic ignition,Just wanted a little more spark and open the plug gap,it has more compression ,engine has been completely redone, just got to find a coil!!

Your rotor and distributor cap may not stand a higher voltage.Spark plugs fire at 8 to 10,000 volts.

Just swapping out the points for an electronic module will increase spark energy with a stock coil.

Pertronix makes one, available on this site.