Mag voltage while cranking
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Topic author - Posts: 164
- Joined: Sat Mar 09, 2019 5:12 am
- First Name: Mike
- Last Name: Sleep
- * REQUIRED* Type and Year of Model Ts owned: I have 26 & 24 coupe, 25 pickup, and 26 Fordson.
- Location: Kansas
- MTFCA Number: 31639
- MTFCI Number: 31639
Mag voltage while cranking
What voltage should you get with an analog A/C voltmeter at the mag pickup point when cranking? I’m looking at a non running car that has sat for years and wondering if mag is functional. There maybe other simple test, and open for ideas. Thanks
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- Posts: 6431
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: '13, '15, '19, '23
- Location: Clark, WY
- Board Member Since: 2005
Re: Mag voltage while cranking
A couple of volts
pull 4 plugs out, have someone place leads and a 6V bulb across mag post and ground and have them watch. Spin the engine and the bulb should flicker/flash, though not very brightly.
if it has been sitting for a long time, you might wish to jack up the drivers side rear wheel, place handbrake lever in "neutral" and have a go at it. This will be the least resistance to cranking that you will be able to achieve and thus the highest mag speed.
pull 4 plugs out, have someone place leads and a 6V bulb across mag post and ground and have them watch. Spin the engine and the bulb should flicker/flash, though not very brightly.
if it has been sitting for a long time, you might wish to jack up the drivers side rear wheel, place handbrake lever in "neutral" and have a go at it. This will be the least resistance to cranking that you will be able to achieve and thus the highest mag speed.
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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- Posts: 203
- Joined: Mon Jan 07, 2019 2:41 pm
- First Name: Anthonie
- Last Name: Boer
- * REQUIRED* Type and Year of Model Ts owned: 1912 touring 1923 roadster 1925 pickup
- Location: Klaaswaal NL
- MTFCA Number: 19790
Re: Mag voltage while cranking
Mike ; As soon as I mounted the Coilring and Flywheel , I test the mag output . When I crank as fast as I can, then I have about 3 1/2 V AC .
Toon
Toon
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- Posts: 203
- Joined: Mon Jan 07, 2019 2:41 pm
- First Name: Anthonie
- Last Name: Boer
- * REQUIRED* Type and Year of Model Ts owned: 1912 touring 1923 roadster 1925 pickup
- Location: Klaaswaal NL
- MTFCA Number: 19790
Re: Mag voltage while cranking
Scott ; Why jack up the drivers side rear wheel , and not the passenger side ????
Toon
Toon
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- Posts: 6431
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: '13, '15, '19, '23
- Location: Clark, WY
- Board Member Since: 2005
Re: Mag voltage while cranking
Anthony
either, or both wheels works
I suppose if you do both, you take the differential out of the equation
either, or both wheels works
I suppose if you do both, you take the differential out of the equation
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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Topic author - Posts: 164
- Joined: Sat Mar 09, 2019 5:12 am
- First Name: Mike
- Last Name: Sleep
- * REQUIRED* Type and Year of Model Ts owned: I have 26 & 24 coupe, 25 pickup, and 26 Fordson.
- Location: Kansas
- MTFCA Number: 31639
- MTFCI Number: 31639
Re: Mag voltage while cranking
Just checked. Looks like just over 2 volts with hand crank. May not be a good mag, but likely is a functioning mag. Thanks