DUI distributor wiring question.
10-30-2014 | 11:32 AM
#11
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From: bel air, md
10-30-2014 | 04:32 PM
#12
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From: Cudjoe Key FL
Sorry, it's not that I didn't trust you, I just didn't understand your explanation of where you got the power. I took it that you somehow plugged into a flat plug in the EFI harness and that threw me, since mine is carbed. You threw me another little curve with the additional wire for the oil pressure alarm out of the harness. As I said, I am electricity challenged and I just couldn't grasp it. I kept thinking about the ignition module and the knock sensor harness plugs in my boat and didn't know if I could use the purple wires there. I finally realized that all the purple wires were the same size (DUH!!), so I opted for the existing purple (+) coil wire that wasn't being used. All that worry for basically nothing. I kept reading everywhere that the DUI had to have a 12 ga. wire for power.
Oh, and you were certainly correct. If you over think it, it does become more complicated than it has to be and will drive you crazy. I have spent hours searching for info about this.
Next time (if there is one), I will ask more pointed questions and try to get it straight in my thick old head.
Thanks
Oh, and you were certainly correct. If you over think it, it does become more complicated than it has to be and will drive you crazy. I have spent hours searching for info about this.
Next time (if there is one), I will ask more pointed questions and try to get it straight in my thick old head.
Thanks
10-30-2014 | 04:53 PM
#13
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From: On A Dirt Floor
Overthinking can make things mind boggling with no way out.
LOL.
10-31-2014 | 09:26 PM
#14
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From: yorkville,il
05-28-2018 | 01:21 PM
#15
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From: Bluffton, SC
I realize this is an old thread but this is where the search function lead me. I'm hoping some of you are still active. I've gathered that its ok to just wire the DUI unit into the factory ignition wire. My question is in regards to the factory Mercruiser ignition control and knock modules. Can I leave them plugged in and expect them to function as advertised?
Thanks in advance and again my apologies for resurrecting a dinosaur.
Thanks in advance and again my apologies for resurrecting a dinosaur.
05-28-2018 | 10:04 PM
#17
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From: Bluffton, SC
Thanks for the reply! The boat is an extremely low hr boat for it's age. However, previous owners neglected to perform routine maintenance under the mindset of "it's got low hrs." With that being said, cap and rotor, coil, plug wires and more had never been changed. I had run a DUI unit on a ski boat years ago and had great results. However, I was able to just hook up battery/tach and roll. What will I need change on my setup to run the DUI unit?
05-29-2018 | 12:25 AM
#18
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From: SF Bay Area
I was running a DUI ignition off of the purple wire, and then wired in a relay and 12g wire and it completely transformed the performance of the boat. Stronger midrange and top end gained a couple hundred rpm.
05-29-2018 | 07:56 AM
#19
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From: Bluffton, SC
Was it like this?
85 - PURPLE
86 - GND
87 - TO DIST
87a - NOT USED
30 - BATT+
05-29-2018 | 12:00 PM
#20
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From: SF Bay Area
This is a handy little relay from Amazon. A better way to go would be to get another Merc trim/starter relay as they have been proven in marine use.
Another reason not to run the ignition off of the starter is the tether kill switch won’t kill the ignition.
ONLINE LED STORE 40/30 Amp Waterproof Relay Switch Harness Set - 12V DC 5-Pin SPDT Automotive Relays 12 AWG Hot Wires https://www.amazon.com/dp/B01N66W2XF/ref=cm_sw_r_cp_api_i_RuydBbK7SX3ZA
Another reason not to run the ignition off of the starter is the tether kill switch won’t kill the ignition.
ONLINE LED STORE 40/30 Amp Waterproof Relay Switch Harness Set - 12V DC 5-Pin SPDT Automotive Relays 12 AWG Hot Wires https://www.amazon.com/dp/B01N66W2XF/ref=cm_sw_r_cp_api_i_RuydBbK7SX3ZA
