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What makes a 6 volt starter a 6 volt starter.


 
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Randy G
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PostPosted: Sat Jan 19, 2019 7:24 am    Post subject: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote

A late B has a 6 volt starter and a 50 and 520 has a 12 volt starter. They use the same armature,bushings and brushes. Besides the battery applied, is the housings windings the difference? It appears all 3 starters will interchange. Delco starter # 1107942-B, 1108144 & 1108155- 50 and 520. I know a 12 volt change over to a B works fine on an original 6 volt B starter. Did my B switch over 30 years ago and never changed the starter.
 
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David G
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PostPosted: Sat Jan 19, 2019 8:18 am    Post subject: Re: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote

The starter is designed to consume a certain quantity of watts (horsepower). The internals will be wound so the resistances will cause this. So in essence a 12V starter will have twice the internal resistance than a 6V so it consumes the same watts. Starters are series wound with the current going through the field coils and the armature. If you are seeing the same armature part numbers, then the field coils must be different.
 
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Bob
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PostPosted: Sat Jan 19, 2019 8:37 am    Post subject: Re: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote

Yes, the parts catalogs show different field coils.

822187 uses filed coils that come in two parts, 820153 and 820154.

1108144 and 1108155 use 1834324 field coils.
 
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buickanddeere
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PostPosted: Sat Jan 19, 2019 9:45 am    Post subject: Re: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote


DavidG has it covered.
 
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David G
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PostPosted: Sat Jan 19, 2019 9:49 am    Post subject: Re: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote

Wow, you made my day, I value your judgment of what I say.
 
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John T
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PostPosted: Sat Jan 19, 2019 3:55 pm    Post subject: Re: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote

Typically one (among others) difference in 6 versus 12 volt starters or generators is the field windings which have different resistance and different power ratings. The armature is always a very low resistance device. While a 6 volt starter will still "function" at 12 volts if you put 6 volts to a 12 volt starter performance will suffer greatly. Remember power is Volts x Amps and it takes X horsepower to crank an engine over so the 6 and 12 volt starters are a different animal.

John T
 
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Randy G
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PostPosted: Sun Jan 20, 2019 9:58 am    Post subject: Re: What makes a 6 volt starter a 6 volt starter. Reply to specific post Reply with quote

Now I understand! Thanks for the info guys.
 
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