Hot coil

[Jim.ME]

The old coil had a internal resistor, the new one didn't, so I guess that's my problem.

Have you taken an ohm reading between the two primary terminals on the coil you have? What was the ohm reading? If you haven't taken a reading, take one and report the results.

 

[super99]

02.5

 

[super99]

I thought the old coil was getting hot and that's why you replaced it.

Yes, the old coil got hot so I replaced it and the new coil gets hot also.

 

[wore out]

Wires are off of the coil. Voltage on wire to coil is 12.8 volts. Positive lead on tester to positive post on coil is 02.5 . Wire to coil goes into the wrap, can’t tell where it goes.View attachment 120194View attachment 120195View attachment 120196

Looks like your meter will measure op to 5 Amps, why not measure the primary current, as I previously suggested?

 

[JMOR]

sounds like he doesn't want to know. plus, put power into a coil and it ain't going to stay cold!

 

[Geo-TH,In]

sounds like he doesn't want to know. plus, put power into a coil and it ain't going to stay cold!

Jessie
If I recall the 6v coil on my Jubilee uses 4 amps.
The ballast resistor will have 4 amps going through it and has a 6v drop.
The same with the coil.
Why hasn't anyone mentioned measuring the current and the voltage?

I had to look long time to find a ballast to reduce current to 4 amps and 6 volts.
I wanted to have a spare coil and ballast Incase my son needs to replace it.
I ended up using an old ballast from an 1978 dodge Aspen.

 

[BarnyardEngineering]

sounds like he doesn't want to know. plus, put power into a coil and it ain't going to stay cold!

It won't stay cold but it should not be so hot you get burned touching it.

 

[Janicholson]

Two last things. If the tractors charging voltage is higher than 14.7. that is contributing to both hot coils and battery issues. Point gap way small but working can also add heat time from excessive dwell. Jim