Marine: Boating, Sailing, PWC, GPS and Navigation - Mercruiser Thunderbolt I Tachometer

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hmf
08-04-05, 04:43 AM
I'm trying to hook up a Teleflex tachometer to a Mercruiser 454 with a Thunderbolt I ignition system. Is there an hook-up other than the tach wire from the Thunderbolt. If not, is there some circuitry that can go between the lead and the tach to get it to work.