OMC5.7 L Ingition Upgrade...

[bullsnot]

I've got an 88 OMC 5.7 L engine. Since this is basically a marinized Chev 350 I was wondering if anyone has upgraded thier ingition system to something better than the stock system for more reliable spark and better fuel mileage? If this was in a street car I know what I would do (Mallory system) but being a marine application thought I'd get some input.

 

[Black as]

Re: OMC5.7 L Ingition Upgrade...

I've got an 88 OMC 5.7 L engine. Since this is basically a marinized Chev 350 I was wondering if anyone has upgraded thier ingition system to something better than the stock system for more reliable spark and better fuel mileage? If this was in a street car I know what I would do (Mallory system) but being a marine application thought I'd get some input.

Take a look at one of these, it worked great for me 5.7L GM Delco Voyager EST marine electronic distributor

 

[bullsnot]

Re: OMC5.7 L Ingition Upgrade...

Take a look at one of these, it worked great for me 5.7L GM Delco Voyager EST marine electronic distributor

That's just what I was looking for. Thanks. How noticeable was the upgrade for you?

 

[Bondo]

Re: OMC5.7 L Ingition Upgrade...

That's just what I was looking for. Thanks. How noticeable was the upgrade for you?

Ayuh,... Welcome Aboard,... It's the reliability factor, low maintenance too...

Donno how the Delco plays with the OMC shift interrupt either,...

What's on it now,..??

 

[bruceb58]

Re: OMC5.7 L Ingition Upgrade...

To keep an ESA type system with the Delco EST distributor, check out this link:

http://www.marineengine.com/parts/technical_information/cdi_123-7566.pdf

Other option is to rewire the existing shift switch bypassing the ESA which is less desirable.

 

[Black as]

Re: OMC5.7 L Ingition Upgrade...

That's just what I was looking for. Thanks. How noticeable was the upgrade for you?

It was money well spent and they even supply a wiring diagram to suit the OMC set up but you must stipulate that when you purchase it.

 

[Howard Sterndrive]

Re: OMC5.7 L Ingition Upgrade...

more reliable spark and better fuel mileage?

points are the most reliable (if maintained) and field fixable, but that Delco system has a good rep for electronic. And it's a system that needs almost no maintenance. It's basically the marine version of GM's tried and true HEI.
Ignition upgrades will not yield any fuel economy gain or power increase on a boat, it's just about lower maintenance.