Snap On MT 431 Ignition Analyzer????

JD Seller

Well-known Member
Do any of you know how to use this tool??? In my fooling around with the JD 4020 gas ignition system I remembered having this Analyzer. It was a good friends of mines. When he passed I bought all of his tools from his widow. This was part of the lot. That was 3 years ago. The battery ( One "C") still reads as being above where the meter tells you to change the battery.

This Analyzer appears to be for checking coils and spark plugs. The meter is analog and reads in KV. There are two clip on leads that are red and black. There is another larger wire that has a flat spring clip with insulators on it like you would clip on plug wires or such.

If this will check the ignition voltages while the engine is running this would be real handy.
 
Hello JD Seller,

Sounds like a an old style timing light setup. Two leads for the battery and one is series between the plug and the plug wire,

Guido.
 

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