Super ELTO J Ruddertwin coil issues

[mrbean]

Hello
I have rebuilt the motor but seem to have a bad coil. How do I confirm this?
When I put the voltmeter on the plug leads I get a 6.7 reading. However when I test the battery leads or the timer leads I get 0 rating.
I assume I should draw a similar reading…
Any help is appreciated.
thanks
Mr Bean

[jcrigan]

Across the plug leads is the secondary coil and 6.7kohms sounds right. The points in the timer close for only a fraction of a second so you may not get a reading. Be careful with those points as they break easily and are difficult to find replacements. Best to only clean the points and leave the gap as is.

[lyks2tinkr]

If secondary resistance is good and you still have no spark you probably have a bad capacitor aka condenser inside the coil. I find it to be a common failure on these coils. They were a pretty loosely wrapped foil capacitor.
Clean the points and click the timer again if you don’t have spark it is most likely the internal cap.

[jcrigan]

Could you put a condenser across the points without removing the internal condenser? Like a 0.1uf/600 volt. I suppose it depends on whether the condenser is shorted or open.

[mrbean]

I gapped the points and still no spark. Sounds like a bad capacitor. I have seen some tutorials on how to open these up and repair them. This is a little out of my comfort zone but I’m up for the challenge. If anyone has any specific guidelines to replace the capacitor that would be most helpful…?
This is great forum! Its amazing that there are so many people willing to help and educate!!
Thanks

[The Boat House]

Here are some pictures of what is in there.
Some put the coil in the freezer to get
the tar hard and chip it out. I never could
get the wires clean enough to solder them.
Tar would start running from the heat.
That’s me though. Others have done it.
I use to take them out and clean them up
but that’s such a PITA and they don’t always
like that. I would end up going through
all that crap for nothing. The You Tube
link at the bottom is what I do now so
you have options. The other link explains
how the timer operates.

https://www.youtube.com/watch?v=e2vxDqF_OEU

https://www.youtube.com/watch?v=zLS6IglCy9k

[mrbean]

Thanks Tubs. Great info!!

[mrbean]

I have the coil case opened. As a quick fix, can I just simply cut the condenser wire and solder a new condenser to it…?
the wires seem in ok shape.

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[lyks2tinkr]

The short answer is yes you can. A .15 uF capacitor will do nicely. I have rewired several of the Elto coils and have had good results.
The wiring looks kind of toasty to me.

[lyks2tinkr]

The capacitor you use should be the kind that charges and discharges fast also known as Dv/Dt

[Author]

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