Quoting Removed, click Modern View to see First the qualification: I'm not a degeed EE, but I do motor and electronic work professionally, and have seen exactly what you are describing.
Yes, you can change the brush position and slow the starter, but the current will not really drop much, which just makes the starter far less efficient with the energy provided (more heat than movement). Universal motors are designed A LOT different than a starter (a lot more poles on the rotor and more field windings), even if the same basic principles apply.
I just had my 6v starter rebuilt with 12v field coils - not that it wouldn't work at 12v when I converted the electrical system, but the bendix was shot (and I was hand cranking it a 6v) long before it had the chance to be "abused" at 12v. Cold weather made the starter fix a necessity.
Maybe the extended cold weather cranking necessary at 6v ruined the bendix. I know it does a lot better now at 12v. :)
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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