Trying to replace Bosch TK12/3 star coil

[coolairX2]

I have been using a Bosch TK12/3 star coil on my Okrasa engine for many years. This weekend my coil started going south I see a weak yellow spark and I lose power at random times, might run fine for 30 minutes but typically will start cutting out after a few minutes of running. Once it dies it starts right back up and idles just fine.

Anyone have any information on what these were used on and if I can replace it with the same unit. They seem quite rare but would like to get a similar unit. Have a Bosch blue coil but hate the look of it but it does seem to run better.

[oldslow]

https://www.thesamba.com/vw/classifieds/detail.php?id=466690


If not this, then you will have to track down an old and expensive part

There are some who will want your non working coil
_________________
- better to drive a slow car fast than fast car slow -

[coolairX2]

Thanks for the tip. It seems he his coming out with a repro 12v star coil may just wait for that.

Why would someone want a bad coil can these be rebuilt? If so who does this?

[evanfrucht]

[Frederik]

This would be pretty cool coil on an early vintage speed
https://www.thesamba.com/vw/classifieds/detail.php?id=2034788

Ah sorry didn't notice you had a 12V coil. TK12/3 was used on many european cars. If you like I can see if I have a list, but I don't think it will make it more easy to find one.

TK was the standard high energi coil, 12 (volt) or 6 (volt)/3 used as factory installations (black). TK 6 or 12/4 was pretty mutch the same coil (same spec.) but painted blue and sold as replacement or upgrade by bosch. TK 6 or 12/5 was for 6-cyl (or high rev).

This is from the 1947 Swedish bosch parts book, it only list the most common cars at the time but if it is interesting I can check my later 50's bosch books for cars that used TK12/3?

[coolairX2]

Thanks for the information

[nlorntson]

https://splitpartsunlimited.com/product/bosch-style-star-coil-repro/

[coolairX2]