6V starter.

[Grinderhead]

Will a 6v starter work ok on a 12v system?

 

[JMOR]

Been doing it for decades.

 

[duey]

As JMOR says, Yes, very well. I used a #4 ga wire rather than the huge wire used with 6 volt... but only to provide a Slightly small current hit. No problem.

 

[Tim PloughNman Daley]

Starter Motor doesn't care if 6V or 12V as JMOR stated. Many have switched to a 12V system and left their OEM 6V Starter Motor intact. Know which one to use. The 9N/2N
Model used a 1-WIRE unit with NO Relay (Solenoid). The 8N and up uses a 3-Wire unit WITH a RELAY (Solenoid). Both are wired differently. Use your manuals.

Tim Daley(MI)

 

[Eman85]

(quoted from post at 18:12:35 02/20/23) As JMOR says, Yes, very well. I used a #4 ga wire rather than the huge wire used with 6 volt... but only to provide a Slightly small current hit. No problem.

Run that theory by me if you would.

 

[JMOR]

(quoted from post at 16:10:01 02/21/23)

(quoted from post at 18:12:35 02/20/23) As JMOR says, Yes, very well. I used a #4 ga wire rather than the huge wire used with 6 volt... but only to provide a Slightly small current hit. No problem.

Run that theory by me if you would.

otor can't draw as much current thru the smaller gauge wire/cable.

 

[HarryVanderpool]

Actually, when the voltage increases across a given load, amperage decreases.
The wire is not "current limiting" the circuit.
In this case, the voltage is doubled and the current is halved.
Eather wire size will work the same since they are adequate.

 

[JMOR]

(quoted from post at 23:16:35 02/21/23) Actually, when the voltage increases across a given load, amperage decreases.
The wire is not "current limiting" the circuit.
In this case, the voltage is doubled and the current is halved.
Eather wire size will work the same since they are adequate.

uite obviously, you have never measured the starter motor current fed by a 6v battery & then again fed by a 12v battery. I have.

 

[teddy52food]

So what was the result??

 

[teddy52food]

Accually , the 12 volts causes the armature to spin faster which acts like a generator
and bucks the current from the battery so it draws less. Magnetic field comes from the
atoms of the wires excited by the VOLTAGE. If it came from the current , it would spin
faster on 6 volts but it doesn't.

 

[duey]

It depends on how many 'constants' you wish to factor in on your paper formulae.... Without a pencil and paper in your hand, take your trusty volt meter and read the voltage loss across the length of the starter cable with a constant cranking load: First using a 'small' cable and Then using a 'large' cable. Or is it me that can't see the Forest for the Trees.

 

[JMOR]

(quoted from post at 15:53:05 02/22/23) It depends on how many 'constants' you wish to factor in on your paper formulae.... Without a pencil and paper in your hand, take your trusty volt meter and read the voltage loss across the length of the starter cable with a constant cranking load: First using a 'small' cable and Then using a 'large' cable. Or is it me that can't see the Forest for the Trees.

n my Farmall SMTA, the draw on 6v is 280A and 400A with 12v. Spins very noticeably faster & Bendix sound is a hard hit. 400/280 = 1.43 or 43% MORE current. No 'theory', no calculators, no pencil & paper involved......just analog meters.

 

[Bspauld]

I have had it done for several years to, I got mine in 1969 and converted it to 12 volt, never have had a problem except installing new brushes a few years ago.

 

[boler76]

works just fine until the bendix breaks

 

[Abbby]

Did it for over 20 years

 

[JMOR]

(quoted from post at 19:23:39 02/22/23) Did it for over 20 years

ecades on 12v/6v starter motor without Bendix trouble. I'm afraid that People hear about such and repeat it whether or not they experienced it.

 

[HarryVanderpool]

Someone with an N with 12v and another with 6 volt, please take an amprobe and measure current while running the starter.
If you can, find inrush and starter run as well if possible.
We need to know whose wires are crossed!

 

[JMOR]

(quoted from post at 20:50:15 02/22/23) Someone with an N with 12v and another with 6 volt, please take an amprobe and measure current while running the starter.
If you can, find inrush and starter run as well if possible.
We need to know whose wires are crossed!

ead the thread....I already told you what I measured on a 4 cyl SMTA and it looks like maybe the 8N is a little less. So, just apply 150/280=53%.. All that proves is that 12v current is still 43% more. No theorizing, just measurements. Inrush will be ~ 2 to 3X cranking current). I'm about done, so if you really want measurements on your 8N (can't live with Ford specs), then buy yourself equipment, like I have, and measure it yourself.

 

[duey]

Harry, you have the short straw... get on it!! (Not 'SOMEBODY)

 

[HarryVanderpool]

ead the thread....I already told you what I measured on a 4 cyl SMTA and it looks like maybe the 8N is a little less. So, just apply 150/280=53%.. All that proves is that 12v current is still 43% more. No theorizing, just measurements. Inrush will be ~ 2 to 3X cranking current). I'm about done, so if you really want measurements on your 8N (can't live with Ford specs), then buy yourself equipment, like I have, and measure it yourself.[/quote]

A bit too much caffeine today?
Happens to the best of us.