Another new one on me. Coil problem
Posted: Sun Jun 29, 2025 12:17 pm
A T I am working on has a "new" set of Bitner coils. They look really nice. My local coil expert tells me they were really good coils. My first experience with his coils.
I took em to out thursday T party. (Teck session) Coils were way out of tune. Points are not marked KW or any other parentage.
Points took a lot of tweaking, but came in excellent on the ECCT.
One coil had the points stuck together.
Running in the T, one plug shorted didnt change the running @ that cylinder. In switching coils around, I found the problem was one particular coil. The points would stick together. I pull the coil, unstick the points & it functioned properly for less than a minute. Points stuck together again. So then, while running I feel the lower point not moving. I can push that point down & the motor runs on all 4 again for a few seconds While I feel the point fluttering.
So, pull the coil out again. Paying careful attention, I notice there is no point gap. Push down to unstick the points & the point gap reappears.
Surprise. The iron core pack is loose in the coil & moving itself up to the bottom of the point instead of magnetically pulling down the point plate.
I dripped some super glue around the core pack to wick in & lock the core in place. Will see today if that worked.
This is a coil problem I hadnt heard of before. "If if it aint something, its something else"
I took em to out thursday T party. (Teck session) Coils were way out of tune. Points are not marked KW or any other parentage.
Points took a lot of tweaking, but came in excellent on the ECCT.
One coil had the points stuck together.
Running in the T, one plug shorted didnt change the running @ that cylinder. In switching coils around, I found the problem was one particular coil. The points would stick together. I pull the coil, unstick the points & it functioned properly for less than a minute. Points stuck together again. So then, while running I feel the lower point not moving. I can push that point down & the motor runs on all 4 again for a few seconds While I feel the point fluttering.
So, pull the coil out again. Paying careful attention, I notice there is no point gap. Push down to unstick the points & the point gap reappears.
Surprise. The iron core pack is loose in the coil & moving itself up to the bottom of the point instead of magnetically pulling down the point plate.
I dripped some super glue around the core pack to wick in & lock the core in place. Will see today if that worked.
This is a coil problem I hadnt heard of before. "If if it aint something, its something else"