Do currently available instruments measure Dwell on 6v systems?

[Alan M]

I need to buy a new meter to measure dwell on my 6v system.  The new instruments currently advertised do not say if they will work on 6v systems.

Do they need to specify that or do they work on 6v and 12v?  Does anyone have any recommendations on one that is currently available like possibly at the local auto parts stores or Walmart?

thank you.

[Bloo]

Most 12 volt units will not work at all. Positive ground throws up yet another roadblock if you happen to have that.

 

Analog two wire units have a higher probability of working, especially if they use a "SET" knob to calibrate the dwell scale. It should read 0 with the points open (no dwell) and the number of degrees between cylinders (45 for 8cyl, 60 for 6cyl, or 90 for 4cyl) when the points are closed. If you can get it to do that, it will work.

 

Three wire units, including most digital ones, probably won't work.

 

Edited March 20, 2022 by Bloo (see edit history)

[keithb7]

I bought an older Snap-on tach/dwell meter from the ‘70s. Works very well on 6V and 12V systems. 

[Mark Shaw]

I often see older engine test equipment on Craigs List.  

[Mark Gregush]

My older analog Sear's one will work on 6 or 12, negative or positive ground. It's all a matter how you hook it up and read the scale. 

[aron_budapest]

Mine is approx 1980 usa tool, works fine, but i use a 12v battery only for the tool.