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Tool Talk Discussion Forum

Ignition KV/RPM Probe

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ERT

05-25-2007 06:55:14

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I�ve been looking for a hand held tachometer for magneto equipped engines and ran across a Snap On MT2700 on Ebay that measures the peak spark KV. I don�t think it provides an RPM readout however.

I also looked at a Kal KM2993 on Ebay that gives RPM but appears to only work with modern ignition systems.

It seemed to me that there might be a device out there that would work on magneto systems and provide both peak voltage and RPM.

Any ideas?

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Dell (WA)

05-27-2007 19:32:25

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Re: Ignition KV/RPM Probe in reply to ERT, 05-25-2007 06:55:14

ERT..... ...gitta watch battery powered LCD tachometer $25 (cheap) they wrap an insulated wire around enny sparkie wire to pick-up the sparkie energy so you don't haffta find enny connections to hook to. You can then dip-switch how many cylinders and etc. It won't measure yer sparkies killo-volts howsomevers.

Make a "calibrated" sparkie tester by taking enny ol'sparkie and bending the side electrode out for a full 3/16" gap. Clamp the sparkie metal shell to enny convenient metal bracket. Plug enny sparkie wire to top of yer calibrated tester. Now try and crank yer engine while watching the GAP for blue-snott sparkies jumping. Wimpy yellowish-orangish or no sparkies FLUNK the test. Simple, eh?

For reference purpose, my eazy starting 6-volt 8N sparkies will jump a full 3/8" gap..... ..Dell, yer self-appointed sparkie-meister

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