My question is if I had a ballast resistor, wouldn't its presence be noticable near the coil? My coil is a standard oil-filled coil with markings 12v use with external resistor. Re: Ballast resistor and coil confusion Now I know why it's taken me a year since I bought this conversion kit to finally get around to installing it. Merc uses a resistor Wire, rather than a ballast resistor. Splice a wire solder is best in there and attach to your red wire. Today we are delighted to announce we have found an extremely interesting content to be discussed, namely 1972 mercruiser 120 wiring diagram. We never store the image file in our host. For installations that use a primary ballast resistor, connect the red ignitor wire to the ignition switch side of the resistance.
The third wire is white and it is attached to the positive side of the coil. It does appear that a white wire does at some point leave the bundle and is attached to this device in the attached photos. After 45 years of running my Sea Ray on a conventional points and condenser ignition, I am installing a Sierra electronic conversion for 4 cyl Delco ignition. Which is what you need for proper operation. Note: We cannot guarantee that every book is in the library. We hope you glad to visit our website. One is a light brown and another is a dark brown.
?? My Mercruiser is a 4cyl, 153 cu. The other diagram says to connect the red wire to a ballast resistor which is itself connected to the coil. What you are doing is feeding reduced voltage to the coil, while feeding the full 12V battery voltage to the module. So what do I do step-by-step to deal with my red wire coming from the ignitor? Transom Standard Serial Number 0W173658 and Above Transom High Performance Serial Number 0W150260 and Above Mercury Mercruiser D1. Which terminal on this ceramic block will likely be the one I connect the red wire from the ignitor? Re: Ballast resistor and coil confusion I do appreciate your kind assistance with my problem.
. I know this is a lot of questions but I think I'm getting close on this one. Is this device some sort of resistance device designed in the stone age? Just for a check measure the voltage at the coil switch on run , should be something less than battery voltage. I have got to to the final instruction where I must do something with the red wire from the ignitor. Since the white wire coming from positive side of the coil leads to another big bundle of black taped wires it might be a nightmare to try to find its origin unless this device is what I am looking for. I have never had a coil issue ever with my old standard ignition.
I'm thinking I should just connect the red wire to the positive side of the coil and start the engine. I traced the white wire and two brown wires taped bundle to another taped bundle of more wires that lead to who knows where. Some people attempting to find information about 1972 mercruiser 120 wiring diagram and of course one of them is you, is not it? My question is if I had a ballast resistor, wouldn't its presence be noticable near the coil? Surely I am not the only boater who has installed one of these conversion kits. Re: Ballast resistor and coil confusion If Chris is right and he usually is , trace that white wire back to its origin and expose the wire there. If you need to remove any file or want to see the images, please contact original image uploader or browse out there. Do not forget to share and love our reference to help further develop our website. Bravo Two, Bravo Two X, Bravo Two X Diesel, Bravo Three, Bravo Three X, Bravo Three X Diesel Serial Number 0M198373 and Above.
Is this device some sort of resistance device designed in the stone age? My coil is a standard oil-filled coil with markings 12v use with external resistor. What is it and could it be the location I am looking for? If you prefer traditional service manuals Seloc also offers a full line of printed engine repair and maintenence guides. Inboard , , , Mercruiser Gas 5. One diagram says to connect the red wire to the positive side of the coil. Cancel the membership at any time if not satisfied. I don't want to mess up my existing wiring nor do I want to fry my new electronic ignition.
Book Descriptions: 1972 Mercruiser 120 Del Schaltplan is good choice for you that looking for nice reading experience. Meter 'em to know, then hook yer wire to the 12v leg. Refer to Transom Assembly sections of this manual for identification information. There are many reasons why you are searching for details about 1972 mercruiser 120 wiring diagram, and surely, you are searching for different concepts for your purposes. Re: Ballast resistor and coil confusion The instructions say that for installations that do not use a primary ballast resistor, connect the red ignitor to the positive coil terminal.
You can also find other images like wiring diagram, sensor location, fuel pump location, starter location, control module location, parts diagram, replacement parts, electrical diagram, repair manuals, engine diagram, engine scheme, wiring harness, fuse box, vacuum diagram, timing belt, timing chain, brakes diagram, transmission diagram, and engine problems. Any help would much appreciated. I traced the white wire and two brown wires taped bundle to another taped bundle of more wires that lead to who knows where. Please read our description and our privacy and policy page. Does the instructions say to hook yer red wire to the battery side of the ballast resistor, or the lower resisted side of it,. Service Manual 31 Part Number 90-864260.
What should the readings be? One diagram says to connect the red wire to the positive side of the coil. Since the white wire coming from positive side of the coil leads to another big bundle of black taped wires it might be a nightmare to try to find its origin unless this device is what I am looking for. Download Manuals mercruiser sterndrive mcm 165 power steering tube problems wiring diagram for trim 120 and 140 and engine workshop manual 1972 mercruiser sterndrive troubleshooting guide 1980 470 service manual 1983 mercuisre outdrive repair 1984 sea ray omc sterndrive repair manual 1987 mercruiser bravo sterndrive service and maintenance 1987 omc 3. Register a free 1 month Trial Account. Re: Ballast resistor and coil confusion Thanks for the replies. For more detail please visit image source : www.
If it needs a full 12 volts, you need to tap into the ignition circuit, before the resistor wire. I've worked all afternoon on this project and I am still not finished Re: Ballast resistor and coil confusion No, the resistance wire which you should have reduces the voltage to the coil + when the ignition switch is in the run position. So that when the ignition switch is in the run position you are feeding a full 12 volts directly to the red wire. I have never had a coil issue ever with my old standard ignition. About Picture information: Pic has been submitted by author.