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Subject: 1948 8n starter

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John McQuaid    Posted 11-18-2017 at 16:54:51 [URL] [DELETE]        [Reply] [Email]  
  • 1948 8n starter
  • Hello, my starter is only about two years old. The rachet style drive failed on the tractor engaged to the flywheel. I removed the drive and retracted it AND reinstalled. When I bench test the starter it spins but does not pull in to engage. Does this mean the drive is bad or does it need to be installed in the tractor to work properly?
    BTW I found the precudure on utube to unretract the drive.

    Dollar Bill    Posted 11-20-2017 at 05:13:30 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1948 8n starter
  • John IMHO, if it has failed once already I would replace it.

    Tim Daley(MI)    Posted 11-19-2017 at 05:40:22 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1948 8n starter
  • Do you have a 6-Volt battery or a 12-Volt battery and how is your battery? You need a good, fully charged battery to spin the starter. You need a fully charged battery that will sustain the charge under load. You can test specific gravity with a hydrometer or take the battery to your trusty local starter/alternator shop and they will bench test it usually for free. Bargain-house batteries have short life spans, 2 years or less has been my experience. Some fellas who 'convert' to 12-volts simply slap a 12-volt battery on. It will spin the starter faster, yes, but won't have a long life either. The starter shop can bench test the solenoid as well. Meantime, seek out Wiring Pictograms by JMOR in our HOW-TO's/Electrical for all the correct ways to wire these old N's.

    Tim Daley(MI)

    Tony    Posted 11-19-2017 at 12:06:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1948 8n starter
  • Hi Tim,

    A 12v battery used with a 6v starter will do the job for along time if the 12v is fully charged you don't grind on it without starting until it groans and quits. If an engine doesn't start after a short time there is something wrong.

    Over the years I installed 6/12 batteries in 6v cars. THe kits came with a special battery, and series parallel switch which allows starting on twelve and charging on six. In series for start, parallel for charging. You can duplicate the system by using two 6v batteries a series parallel switch wired correctly. BUt space was a critical component in the older cars. I did an install in a '53 Ford pickup using two batteries. Plenty of room in the engine compartment.

    I never had a problem with my own cars nor did I get feedback that a starter failed on one of my installations.

    I know of four ton (IIRC) shop crane that used a 6v starter driven by a 12v battery hooked to a reversing switch, and gear reducer powering a chain driven carriage running on four cast iron wheels. Total travel was about twelve feet. Battery mounted on the post. Sometimes when we needed extra snoose we hooked a charger on boost to it. Worked fine for years.


    Bruce (VA)    Posted 11-18-2017 at 17:25:29 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1948 8n starter
  • Put it on the tractor. You're probably not spinning it fast enough to retract.

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