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Help With A Starter Generator


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#1 jessylee OFFLINE  

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Posted November 02, 2012 - 12:34 PM

ok i have a starter generator on om 73 cub and it had stopped charging the battery i had R/R the brushes and it still wont charge its not the wireing bc i had installed it on my cub 108 and it would still not charge the battery i don't know whether or not the field coil is bad in the generator and how would u test to see if the field coil is bad would i use contiguity and or resistance if some one would help pleases

#2 Guest_rat88_*

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Posted November 02, 2012 - 12:43 PM

The 73 had a voltage regulator behind the front grill from what i remember. contacts on that could be dirty or welded shut causing it not to charge

#3 wvbuzzmaster OFFLINE  

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Posted November 02, 2012 - 12:51 PM

Search articles for "testing a starter generator" and look for an article by me. That should help you determine fault in the system.

#4 drbish OFFLINE  

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Posted November 02, 2012 - 01:01 PM

Here is a repair manual to download
http://gardentractor...arging-systems/

#5 olcowhand ONLINE  

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Posted November 02, 2012 - 02:51 PM

http://gardentractor...r-generator-r78
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#6 wvbuzzmaster ONLINE  

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Posted November 02, 2012 - 03:55 PM

Thanks for grabbing the link Daniel, I was on my Iphone when I posted so couldn't grab the link myself.

#7 glgrumpy OFFLINE  

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Posted November 02, 2012 - 04:15 PM

Hey Thanks! "New". I have MTD 990 with one and briggs and that will be helpful when rewiring! I just printed the Start/Gen parts, about five pages and am good. LOVE those pdf set-ups for printing just what you want and etc.

#8 motobreeder OFFLINE  

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Posted November 02, 2012 - 07:18 PM

Isn't there a step to polarize the generator or regulator?

#9 wvbuzzmaster OFFLINE  

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Posted November 02, 2012 - 07:38 PM

yes but i find it un necessary. If it is working you can unhook the battery and rehook it and still works fine.

#10 achomesteader OFFLINE  

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Posted November 02, 2012 - 09:21 PM

Isn't there a step to polarize the generator or regulator?


If it's a generator, yes. If it's a starter-generator, no. A starter-generator is self-polarizing when you engage the starter.
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