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Old 01-17-2013, 01:34 AM   #13
KR500
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Join Date: Mar 2012
Location: Addison,ll.
Posts: 451
Default Re: Snap-On MT-335 Coil Tester...question

For your Snap-On tester I can email you a copy of the instructions. The tubes are called Geisler tubes and seemed to be used in all the old distributor testers such as Sun(now Snap-On owned) Allen, Weidenhoff and others. Snap-On used to sell a small ball point pen styled tester to check spark at plugs. It also used a Geisler tube. My email is sponge19501924@yahoo. Of course no charge for info.
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