Thread: tach issues???

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  1. 02-12-2017, 05:27 AM #1
    jdb21867
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    tach issues???

    I have a 1996 225 Promax----just bought the motor-----tach jumps around but sometimes settles down and reads right. A friend gave me an identicle tach of unknown working condition----it jumps around also. Voltages regulators are not burnt. Have swaped the tach wire between the 2 regulators--still no fix. connections are good.
    -----Can I trouble shoot the regulators by looking for high-low voltage readings at battary when the tach is actually acting up???

    if not can anyone suggest my next step????? I hate to buy a new tach only to find it may not work either!!!!
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  2. revlimiter
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    #2 02-12-2017, 08:56 AM
    Rockwood, TN?
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  3. jdb21867
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    #3 02-12-2017, 12:41 PM
    yes--where are you??
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  4. EuropeanAM
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    #4 02-16-2017, 06:51 AM
    Please see the Forum Announcements, and be sure to provide the REQUIRED info when posting. Thanks!

    Have you tried moving the adjustment-pot switch on the back of the tach (move a couple positions back and forth, then return to ORIGINAL position)?


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  5. jdb21867
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    #5 02-17-2017, 06:27 AM
    Quote Originally Posted by EuropeanAM View Post
    Please see the Forum Announcements, and be sure to provide the REQUIRED info when posting. Thanks!

    Have you tried moving the adjustment-pot switch on the back of the tach (move a couple positions back and forth, then return to ORIGINAL position)?
    ----will try that with both tachs and rerport the findings---thanx
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