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2n electronic ignition


 
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grandpa Love
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Joined: 26 May 2016
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PostPosted: Fri May 14, 2021 3:51 am    Post subject: 2n electronic ignition Reply to specific post Reply with quote

Digging into the 2n yesterday. Governor was shot, timing gear was shot. Took front cover off motor. Distributor had to come off. Opened it up and no points??? I'm assuming it's EI. Got the wire running to top of coil and another wire from key switch running into the distributor... Why? When we were trying to get it going the other day we had weak spark. It's got a ceramic resistor in line to coil wire. If I use a 12 volt coil do I still need the resistor? I know nothing about EI.... Thanks
 
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Bruce (VA)
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Location: Old Church VA

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PostPosted: Fri May 14, 2021 4:40 am    Post subject: Re: 2n electronic ignition Reply to specific post Reply with quote

Resistors are in the ignition circuit to protect the coil, not the points or EI.

If you have a front coil, even if it's 12v, you still need the oem ballast resistor. See tip # 30. But you do NOT need the ceramic resistor. Remove it.
75 Tips

 
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TheOldHokie
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Joined: 08 Apr 2005
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Location: Myersville, MD

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PostPosted: Fri May 14, 2021 4:48 am    Post subject: Re: 2n electronic ignition Reply to specific post Reply with quote

CVPost-grandpa Love wrote:
(quoted from post at 07:51:39 05/14/21) Digging into the 2n yesterday. Governor was shot, timing gear was shot. Took front cover off motor. Distributor had to come off. Opened it up and no points??? I'm assuming it's EI. Got the wire running to top of coil and another wire from key switch running into the distributor... Why? When we were trying to get it going the other day we had weak spark. It's got a ceramic resistor in line to coil wire. If I use a 12 volt coil do I still need the resistor? I know nothing about EI.... Thanks


EI is just an electronic (transistor) switch. Rather than a mechanical switch a magnetic pickup in the distributor senses rotation and opens and closes the transistor switch in the primary just like points. One wire supplies full time battery voltage to the transistor switch module and the other wire is the coil primary supply which is switched by the electronic "points" to fire the coil just like the mechanical contacts.

If you have a 12v coil ditch the resistor in the primary circuit and good chance your weak spark gets stronger.

IMPORTANT: Make sure you match polarity and voltage on the power supply circuit to the EI module - hook it up backwards or over voltage and you will fry it. Under voltage and it won't switch the primary.

TOH
 
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grandpa Love
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PostPosted: Fri May 14, 2021 4:48 am    Post subject: Re: 2n electronic ignition Reply to specific post Reply with quote

What's the extra wire running into the distributor?
 
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grandpa Love
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PostPosted: Fri May 14, 2021 4:49 am    Post subject: Re: 2n electronic ignition Reply to specific post Reply with quote

Change back to points?? Or leave it
alone if it's working?
 
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TheOldHokie
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PostPosted: Fri May 14, 2021 5:44 am    Post subject: Re: 2n electronic ignition Reply to specific post Reply with quote

CVPost-grandpa Love wrote:
(quoted from post at 08:48:28 05/14/21) What's the extra wire running into the distributor?


Battery power for the control module. It should come straight from the ignition switch to the module which is grounded to the distributor housing. The other wire is the normal coil primary wire.

TOH
 
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old
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Location: Lake of the Ozarks area of MO

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PostPosted: Fri May 14, 2021 7:40 am    Post subject: Re: 2n electronic ignition Reply to specific post Reply with quote

I have a complete distributor that will fit it including a couple of coils and points etc. Most of what I have is sitting here on the desk in a zip lock bag
 
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