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Starter Motor Issue
#4
Hi Graham

I'd be inclined to check the brushes first, and make sure they are free to move.

It's a long time ago now, but I seem to remember that part of the current path in the brush holders is via rivets. These can be mechanically tight, but get corrosion under their heads. With the high current drawn by the starter, the slightest extra resistance has a significant effect. I think I left the rivets in place but soldered a braided link in parallel.

The winding resistances will be maybe 10 or 15% higher when the starter is good and warm, which will also reduce the current slightly.
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Messages In This Thread
Starter Motor Issue - by Graham Barker - 03-02-2022, 09:27 AM
RE: Starter Motor Issue - by Nick Salmon - 03-02-2022, 09:52 AM
RE: Starter Motor Issue - by Ivor Hawkins - 03-02-2022, 10:04 AM
RE: Starter Motor Issue - by John Cornforth - 03-02-2022, 10:44 AM
RE: Starter Motor Issue - by Graham Barker - 03-02-2022, 07:44 PM
RE: Starter Motor Issue - by Bob Culver - 03-02-2022, 07:48 PM
RE: Starter Motor Issue - by dickie65 - 03-02-2022, 10:09 PM
RE: Starter Motor Issue - by Graham Barker - 04-02-2022, 07:46 PM
RE: Starter Motor Issue - by Bob Culver - 07-02-2022, 09:25 PM
RE: Starter Motor Issue - by Graham Barker - 11-02-2022, 05:25 AM
RE: Starter Motor Issue - by John Cornforth - 11-02-2022, 10:35 AM
RE: Starter Motor Issue - by Dave Mann - 11-02-2022, 09:11 PM
RE: Starter Motor Issue - by Graham Barker - 11-02-2022, 09:32 PM
RE: Starter Motor Issue - by Jeff Taylor - 12-02-2022, 05:37 PM
RE: Starter Motor Issue - by Graham Barker - 12-02-2022, 06:46 PM
RE: Starter Motor Issue - by Dave Mann - 18-02-2022, 03:41 PM
RE: Starter Motor Issue - by andrew34ruby - 18-02-2022, 03:55 PM
RE: Starter Motor Issue - by Steve Jones - 18-02-2022, 04:04 PM
RE: Starter Motor Issue - by Dave Mann - 18-02-2022, 09:39 PM
RE: Starter Motor Issue - by Dave Mann - 21-02-2022, 09:16 PM
RE: Starter Motor Issue - by Reckless Rat - 21-02-2022, 09:25 PM
RE: Starter Motor Issue - by Dave Mann - 22-02-2022, 09:45 AM
RE: Starter Motor Issue - by Bob Culver - 22-02-2022, 05:21 PM
RE: Starter Motor Issue - by Dave Mann - 12-03-2022, 10:38 AM
RE: Starter Motor Issue - by Barry Townsend - 12-03-2022, 11:02 AM
RE: Starter Motor Issue - by bob46320 - 12-03-2022, 07:36 PM
RE: Starter Motor Issue - by Ivor Hawkins - 13-03-2022, 11:40 AM
RE: Starter Motor Issue - by Dennis Nicholas - 14-03-2022, 02:23 PM
RE: Starter Motor Issue - by Reckless Rat - 14-03-2022, 02:33 PM
RE: Starter Motor Issue - by Steve Jones - 14-03-2022, 03:03 PM
RE: Starter Motor Issue - by Bob Culver - 14-03-2022, 07:15 PM
RE: Starter Motor Issue - by Dave Mann - 14-03-2022, 09:10 PM
RE: Starter Motor Issue - by Bob Olive - 13-06-2022, 07:13 PM
RE: Starter Motor Issue - by Reckless Rat - 13-06-2022, 07:22 PM
RE: Starter Motor Issue - by Ivor Hawkins - 13-06-2022, 08:35 PM
RE: Starter Motor Issue - by Bob Kneale - 13-06-2022, 08:44 PM
RE: Starter Motor Issue - by David Stepney - 13-06-2022, 09:01 PM
RE: Starter Motor Issue - by Jeff Taylor - 13-06-2022, 11:04 PM
RE: Starter Motor Issue - by Bob Olive - 14-06-2022, 05:51 AM
RE: Starter Motor Issue - by Bob Olive - 20-06-2022, 01:44 PM

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