Do I need a resistor?

ol' poke

New User
I have a '50 8N, ser# 339xxx. 6V positive ground. Side mount distributor. I'm working on getting it started, but it has an intermittent spark. I'm tracing from the battery forward:
Battery: 6.4 v standing
5.7 v when I engage the starter.
Coil: New
6V coil
Wired batt. to minus, plus to distributor.
1.2 ohms primary
8.4K ohms secondary
plus terminal reads 6.4 v (points open) to ? closed.

I've never had a resistor in this system before when it was running fine. Should I have one in the above setup? Why or why not?


Thx, ol' poke
 
(quoted from post at 13:22:47 08/12/22) I have a '50 8N, ser# 339xxx. 6V positive ground. Side mount distributor. I'm working on getting it started, but it has an intermittent spark. I'm tracing from the battery forward:
Battery: 6.4 v standing
5.7 v when I engage the starter.
Coil: New
6V coil
Wired batt. to minus, plus to distributor.
1.2 ohms primary
8.4K ohms secondary
plus terminal reads 6.4 v (points open) to ? closed.

I've never had a resistor in this system before when it was running fine. Should I have one in the above setup? Why or why not?
No resistor needed. 8N side mount distributor with round can coil of around 1.1 to 1.3 Ohms primary res did not use resistor on factory 6v system.

Thx, ol' poke
 
The side mount 8N does not need either of the resistors required for the front mount square 6 volt coil. The resistors are needed to protect the square 6 volt coil from over current.

Best explanation I got! The Gurus can explain better.

FYI. I BENCH tested my new round 6 volt coil, before installation, on my 8N52. Results were:

Battery terminal to Distributor terminal = 1.2 Ohms
Secondary terminal to Battery terminal = 4.3kOhms
Secondary terminal to Distributor terminal = 4.3kOhms
 
Where are you testing that you get intermittent spark? What are you testing with? Check the ignition switch wires for voltage and wiggle to see if it's the problem.
 

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