est ignition on a 1989 4.3 liter cobra.

rolmops

Vice Admiral
Joined
Feb 24, 2002
Messages
5,419
Working on this project I find myself going back and forth between the 4.3 liter wiring diagram and the 3 liter HO wiring diagram
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,537
For now I plan to completely bypass the ESA system and wire it exactly as a mercruiser. This means that I will connect a +wire to the shift interrupter while the black wire coming from the distributor will be connected on the other side and when shifting ,this will send power to the distributor. This will shut of the ignition for a split second and that will enable me to shift into neutral. This is how the system is set up on all the mercruisers. This way , the ESA and the overstroke switch are out of the loop. Another way to work with the ESA is by removing the current one and replacing it with a different type of ESA which is available from CDI.
Yep....that 's a good way. How is your lower shift cable?

BTW, I would leave the overstroke switch in the loop. You don't want the ignition be interrupted after the shift completes and the overstroke switch prevents that.
 
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