OMC Shift Assist Module

[dobler5]

Hey guys,

Just updated my 1991 OMC Cobra 4.3L with a new delco voyager est electronic distributor. I have it all set up and running but my question is, what do I do with the shift assist module? How do I set it up on my engine or what do I do with it now?

Thanks

 

[Don S]

Re: OMC Shift Assist Module

I don't think you can use it with the EST. The EST uses a completely different system for causing the engine to stuble so it can shift. The original system removed power, the EST needs to have power put to a terminal to cause the stumble. The shift interrup switches and the module all work opposite.

 

[zbnutcase]

Re: OMC Shift Assist Module

Pitch the module and set the system up just like a Mercruiser shift interrupt, but you will have to adapt a N/O (normally open) switch.

 

[dobler5]

Re: OMC Shift Assist Module

http://cdielectronics.com/InstallSheet/123-7566.pdf

Does this look like something I could use?

Or when you talk about hooking it up like a mercrusier, is there a wiring diagram available to go by? Also an N/O switch, where to buy those at?

 

[LAC_STS]

Re: OMC Shift Assist Module




I posted these before in a different thread. this is for a V8 application but should be the same for a V6 (I think).

These 2 pages are out of a packet Pro Marine gave me on the Delco EST.

 

[zbnutcase]

Re: OMC Shift Assist Module

http://cdielectronics.com/InstallSheet/123-7566.pdf

Does this look like something I could use?

Or when you talk about hooking it up like a mercrusier, is there a wiring diagram available to go by? Also an N/O switch, where to buy those at?

Yes, that will work for you, just note that there are 2 different ones. I did not know that one even existed!

 

[LAC_STS]

Re: OMC Shift Assist Module

You can buy one of the newer style ESA modules or you can wire it up like in the diagram I posted.

Thats what Pro Marine told me when I was asking about the EST kit. Theres another thread a couple weeks ago Where someone changed over to a Delco EST and I posted the same diagrams and thats how they wired it up.

You wire it up like in the digram and there is no need for an ESA module.



I posted one of the wrong pages in my earlier post with the diagrams. I will post the correct page when I get home. The correct page is the same as the OMC wiring page but its for a Merc.

 

[dobler5]

Re: OMC Shift Assist Module

Where can I buy one of the newer ESA modules that will work for my motor?