Snap-on MT-335 coil/condenser tester

[old31]

I bought this Snap-on MT-335 a while ago and just got to testing it. I cant get it to work.

Has anyone used this tester with good results? Does anyone have a good manual?

 

[old ugly]

you can test the coil by hanging onto the wire. that is how my dad did it.

 

[1930artdeco]

Two things: you may have to replace a cap or two, to get it to work correctly. And, you may find a manual over on the HAMB or Garage Journal.

Mike

 

[SAJ]

I had to clean and reset the contacts in the ******** unit that interrupts the low tension circuit to generate the sparks in the high tension circuit. The canister housing the ******** contained an inert gas plus foam rubber insulation. Over time this inert gas escapes. The foam natural rubber decomposes releasing sulphur dioxide from the vulcanising. Both these corrode the contacts.
I have 2 units. Both work after "servicing" the contacts ( cleaning and then tweaking and generally messing about with them until they vibrate). Howeved, after a long time sitting, they again corrode and have to be messed about with again to get them to vibrate.
I have 2 units and they contain 2 different models of ******** with different contact arrangements. Both work but only one has the flash tube. I have not found a source for new flash tubes, but there is a solid state replacement for the vibrators that might work.
The vibrators were used in old car radios to generate the high voltages needed for valves to work.
Here is the instructions.
I will post a video of my unit working as soon as I get time to work out how to do that.
SAJ in NZ
Oops I see that my tester instructions show a different number from your unit. They look the same though. My units are the same model as yours though. I hope this helps

 

[SAJ]

Here is my Snap on coil tester video. Not very professional since I did not expect to pubish. It is a great device when working!
https://youtu.be/xR0n6rjZgBA?si=UNbIWG2P5pTdRarS
SAJ in NZ

 

[mercman from oz]

 

[old31]

This is the inside of the MT335.

1: How do you test the ******** to see if it is good?

2: Notice that there is a pole on the ******** and on the slider switch without a wire. Not sure if that means anything.

 

[midgetracer]

My brother made a electronic unit to replace the ******** in my unit and it works great. I still have the ******** which i kept for sentimental reasons.