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TOPIC: Will OMC tach work On Merc Tower of Power

Will OMC tach work On Merc Tower of Power 14 years 3 months ago #16023

  • bobo
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I need a Tach on My 115 6 Cyl ..I have a OMC tach off of a 115 V4 .The V4 was a 1980 . My Merc is a Blue Stripe Im thinking 84 ..Can it be hooked up to the Mercury and work accuratly ??

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Re:Will OMC tach work On Merc Tower of Power 14 years 3 months ago #16025

  • MarkS
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It might, depends on how the tach gets it's signal. If it's one that reads pulses from the "alternator" (12 pole) it should work. What brand/model is it? Does it have any settings on the back? Pics?

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Mark

Re:Will OMC tach work On Merc Tower of Power 14 years 3 months ago #16043

Hi,
To agree with Mark, yes a 1980 OMC V4 tachometer would read the alternator. The "blue stripe" Mercury started in 1972. Although the OMC tachometer will not work with the 1972-early 1979 Mercury ignition system, the tachometer sender wire (under the motor cowling) can simply be moved to connect at the rectifier. You should not assume, but Mercury did just that on the assembly line starting with the 1975 year model. So, you may not need to make any changes for correct operation.

Regards,
Joe
www.fergusonpoolemarine.com

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Profile Picture:
E. Carl Kiekhaefer (Mercury Founder) & Joe Poole Sr. @ 1964 Mercury Dealer Meeting
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