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-   -   MEFI tack signal (https://www.offshoreonly.com/forums/general-boating-discussion/368331-mefi-tack-signal.html)

actionmarineguy 09-02-2020 04:44 PM

MEFI tack signal
 
what sends the analog tack signal on a mefi system? lost signal on grey wire.

AllDodge 09-02-2020 06:43 PM

Its not an analog signal (its on/off signal, sort of digital) but it would come from the ECM. How it get there depends on which motor (serial number)

actionmarineguy 09-03-2020 11:49 AM

its a crusader mefi 4 i believe. It has no distributor individual coils 8.1 has same old style engine plug as merc can't get a signal when testing grey wire at engine plug. tack just stopped one day. has computer that plug in the front not the sides. any help would be appreciated

AllDodge 09-03-2020 12:06 PM

MEFI's


https://cimg4.ibsrv.net/gimg/www.off...b720eb365d.jpg

Unlimited jd 09-03-2020 12:41 PM

Crusader 8.1 uses MEFI 4.
its a digital signal from the ecm to the boat harness in the gray wire. Disconnect the gray wire from the tach and test the wire in the boat harness and on the engine harness.


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