Magneto/tach ???

Posted by ScottyHONeY on July 27, 2006 at 18:36:59 from (69.95.213.238):

I'm about ready to test fire the BN after a rebuild. If she fires (Why wouldn't she?) the first order of business will be tinkerin' with the carb and governor to impose some order on the rate of fire.

Questions are to do with my tach. Up to now, I've relied on my old 60's vintage dwell/tach. The tach hooks up to the 6/12v lead to the coil on a coil ignition. I don't want to let the smoke out of it, so thought I'd check as to whether it can be used on a magneto system.

If I had to guess, I'd try to hook the tach lead to the screw over the condenser on the mag, the one that anchors the ground lead to the switch. Is there current there that the tach can sense without grounding out the mag? Is there so much current that I'll smoke my tach? If so, any other way to hook it up, or am I gonna have to invest in another tach -- whatever they call those that sense a reflective patch on the turning shaft?

TIA

Scotty

Replies:

• Re: Magneto/tach ??? john *.?-!.* cub owner 20:17:34 07/28/06 (0)
• Re: Magneto/tach ??? magman 06:41:34 07/28/06 (1)
  • Re: Magneto/tach ??? ScottyHONeY 06:51:09 07/28/06 (0)
• Re: Magneto/tach ??? Andy Martin 05:30:25 07/28/06 (0)
• Re: Magneto/tach ??? Bob 19:44:06 07/27/06 (0)

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