11-02-2022, 05:25 AM
I have followed the advice in this thread and appear to have resolved the issue of my starter struggling to turn the engine over when hot.
First I had the battery load tested by a supplier of 6V batteries. He tested the battery on two different load test instruments and very positively said that the battery was fine. He had batteries of the correct size to replace mine but refused to sell me one because he felt that would be fraudulent.
The next step was stripping the starter. The brushes were made of a copper mixture and consequently the interior of the starter was coated with an oily film of copper dust. I washed out the oil and dust with leadfree petrol per Woodrow manual. The was some light rust on part of armature and on two poles. I sanded this off.
There didn't seem to be anything else wrong with the starter, so reassembled and went on a test run. The starter functioned well when hot after the test run. I guess the layer of copper dust was reducing the insulation somewhere.
This is the first time that I have stripped a starter, so was surprised to see copper brushes (expected carbon brushes). Is copper normal for starter motors?
First I had the battery load tested by a supplier of 6V batteries. He tested the battery on two different load test instruments and very positively said that the battery was fine. He had batteries of the correct size to replace mine but refused to sell me one because he felt that would be fraudulent.
The next step was stripping the starter. The brushes were made of a copper mixture and consequently the interior of the starter was coated with an oily film of copper dust. I washed out the oil and dust with leadfree petrol per Woodrow manual. The was some light rust on part of armature and on two poles. I sanded this off.
There didn't seem to be anything else wrong with the starter, so reassembled and went on a test run. The starter functioned well when hot after the test run. I guess the layer of copper dust was reducing the insulation somewhere.
This is the first time that I have stripped a starter, so was surprised to see copper brushes (expected carbon brushes). Is copper normal for starter motors?