Shift interup wiring with HEI
 

going to change out to a HP HEI dist on a friends boat, been using them for years, but its a alpa and has the shift interup setup, how can I wire this ? thanks Rob

Ayuh,.... The only Hei distributors I've ever seen rated for marine motors is those by DUI,....

Who the 'ell is HP,..??

Call them, 'n ask how they think it oughta be done,....

What vintage Alpha,..??
Some of the shift switches are normally open, later ones are normally closed,....

Good question, as the shift interupt on the TBIV interrupts the signal from the pick up.

I'm assuming you are using coil in cap HEI ? There is a merc chart that shows which wire with the external coil (voyager) HEI.

I just hooked up mine and what I found is to attach the interrupt wire to the tach wire on the distributor.

^^^^like^^^^^

no damn like button anymore

I just run the HP HEI from summit, remove the vac advance w/block off kit, use the correct wire connectors, but never used on a alpha..they work great and you can add a digital rev limiter from petronix with a simple dial for the RPM, been using them for years, at least they do not corrode like MSD

Tach wire.
Been discussed here a few times and confirmed.. Even very recently.
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