Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

[ntheyer]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

How do you know if the starter is bad? When the slave solenoid clicks, does that mean it's good, or does it mean it's bad??

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

the starter is its own thing the slave is just to make sure enough voltage reaches the starter solenoid <br /><br />if you cant decide its a coupple of bolts and let a starter repiar shop check it for you<br /><br />ig you do a search on STARTERS thers a link to a merc service to test it your self<br /><br /><br />tommays

 

[jeff13601]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

Do you have a NAPA nearby where you can get it bench tested?

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

the starter is its own thing the slave is just to make sure enough voltage reaches the starter solenoid <br /><br />if you cant decide its a coupple of bolts and let a starter repiar shop check it for you<br /><br />ig you do a search on STARTERS thers a link to a merc service to test it your self<br /><br /><br /> http://www.boatfix.com/merc/Bullet/01/01_11.pdf <br /><br />tommays

 

[jurasicjet]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

Ntheyer:<br /><br />I have a 1992 (its a late 92, some serial numbers actually fall into 1993) model Celebrity with the 4.3 liter in it. I know it is a different engine size than yours but I would expect the wiring might be dang close.<br /><br />Here is a little bit of knowledge that I have, I know it may not be much but here it goes...<br />Last summer I had mucho difficulties with my starter drive getting destroyed by the engine "kicking back" during start and taking the starter drive out. After much research I did learn a little about starter wiring. <br />The Purple/yellow coming from the starter solenoid is an "extra wire" coming from a coil bypass. Somewhere i found reference to this wire. The purpose of the wire is to provide "quicker" starts. So... the purple/yellow comes off the starter (starter solenoid) and on my boat goes to the fuel pump and is also tied into a purple wire that runs to the alternator. This purple wire then runs to the coil and continues on into the wiring harness that runs to the front of the boat. There is an orange wire and a red wire that also come off of the starter solenoid. the orange runs to the alternator (different terminal than the previous purple wire). the red wire runs to a large circuit breaker which comes out the other side as a red/purple wire. The large red wire coming off the starter solenoid goes to the positive of the battery. <br />There is also a yellow/red wire that comes off the starter solenoid and runs to a "starter slave solenoid".<br /><br />Sounds confusing, i know.<br /><br />If ther is a way to scan and post the page out my installation manual I would do that but I don't know how.. or if I could get a fax number from ya I could fax it to ya.

 

[ntheyer]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

That would be fantastic. Your description sounds good, but a fax would be great. 815-385-6735.<br /><br />Much appreciated.

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

ntheyer<br /><br />i was under the mistaken thought that you were useing the correct color coded wireing diagram to install the new harness <br /><br />if not how have you connected everything <br /><br />tommays

 

[ntheyer]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

I have used the correct wiring. It was ordered, brand new Quicksilver. Here is an update so far... I just replaced the starter, the starter solenoid and the slave solenoid with all parts off another engine known to be working. I am now able to jump the starter solenoid directly and get the starter to crank the engine properly... BUT still no action when trying from the key. Now when I turn the key, there is no clicking from slave solenoid, nothing at all. Just a slight voltage drop when turning the key. I took a volmeter to the individual sections of wiring and determined that there is power when turning the key on the small yellow/red wire to the slave... there is no power on the large yellow/red from the slave solenoid to the starter solenoid....??? This slave solenoid was working perfectly??? I just don't understand the problem. I also found out which wires are heating up on the engine. The small purple wires are heating up extremely hot. If Ileave the ignition on, they will start to reach the point of smoking... I have wired everything up correctly. The only thing that is non standard is that I have no safety switches like shift interlock because my boat does not have the switches. I just don't get it.<br /><br />In summary;<br /><br />I have power in the ignition wire from the switch to the slave, but after that. I am going to replace the slave solenoid and see what happens. The other issue is the purple wire in the engine harness gets red hot. There are two small purple wires that get hot. It seems that when I turn the key to the start position, that they get hot faster. Is the starting power somehow going into the harness somewhere else? I'm sorry for these idiot questions, I don't pretend to be any good at electrical at all. I can handle mechanical, just hate electrical.

 

[jeff13601]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

I believe the purple wires you are talking about are resistor wires. Does one of them hook to the positive side of the coil?. If that is one of them that is getting hot, mine will get hot if I leave the key on for a long time without the motor running. I dont know if it is normal though

 

[Bondo]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

Purple is the Ignition Circuit.......Hot with the Key in the "On" position........<br /><br />You've got It Going to Ground,.... Somewhere......<br />That's WHY It's Getting So Hot............<br /><br />Start Disconecting the Purple Circuit,.. 1 step at a time,.. 1 Sub-Circuit at a time,....... <br />Somewhere,.. It's Going to a Solid Ground............<br /><br />It May, Or Not be Related to your Other Issues........

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

(The wiring diagram does not have wires like my purple and yellow one from the coil to the starter, and I don't know what it's function would be. The motor looked like it was in good shape when I dropped it in)<br /><br />i dont no if you used the correct part BUT it doesent seem like yor useing the correct diagram it has to be one for for your engine # there are different ones with small changes you could have and EST IGNITION or a DIGITAL IGNITION <br /><br />0C856559 THRU 0F603999 there are 4 different motor harnesss for this series of motors<br /><br /><br /> 2 84 - 98422A17 HARNESS (DIGITAL IGNITION - 3.0L) <br />2 84 - 98422A14 HARNESS (DIGITAL IGNITION-3.0LX <br />2 84 - 98422A18 HARNESS (EST IGN.) 1 <br />2 84 - 806217A11 HARNESS (EST IGN.)<br /><br /><br />the 3.0 was compleat with the motor harness ??<br /><br />its a hard job dont make it really hard by trying to do it with the worng information<br /><br />tommays

 

[jeff13601]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

I have the engine wiring diagram from a merc 120 hp 1985. Afriend of mine has a 1975 120 and his wiring matches mine. If it will help I can prob tell you where your boat harness is supposed to go. Thats if it really is the same

 

[ntheyer]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

Really good answers folks. While you've been writing, I've been tracing wires... Here is the scoop so far. I haev isolated the bad boy and found that is the purple wire off the ignition coil that splices and joins the two other purple wires in the engine harness before going into the cannon plug and on into the boat wiring. Here is the absolute brain teaser... ONLY the purple wire that leads to the coil gets hot, even though the other two purple wires are soldered together by the factory. The other two purple wires do not get hot at all. Then it really gets interesting... Even when I disconnect it from the coil, IT STILL GETS HOT!! The only thing I can think of is that this purple wire is factory spliced into the purple and yellow wire running to a post on the starter solenoid. Does this mean the starter solenoid is grounding the circuit out??? What I don't get at all though is all of the purple wires are spliced together... doesn't that mean all of the wires are then grounded and all should get hot? Why does only this one little wire get hot? When I say hot, I mean hot.. Ignition ON, within 10 seconds you would not be able to touch it. I can get it hot enough within five seconds to shut it off. I guess I'll replace the starter solenoid. Does this have anything to do with me running the battery ground cable to the bolt off the back of the starter which is indirectly connected to the block through the rear starter bracket? Sorry for all of these shenanigans. I just really don't get why only this solitary wire gets hot.

 

[ntheyer]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

My Engine Serial number is 1409708015590. It is made in Mexico GM 4 Cyl.

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

it more like a OF55?????<br /><br />looking at my diagram<br /><br />PURPLE 5 leaves the cannon plug and goes 4 places<br /><br />1 shift cutout switch<br />2 ignition coil<br />3 alternator<br />4 electric choke<br /><br />RED/PURPLE 6 which you may be confusing goes 3 places it goes on and on you need the diagram<br /><br /><br />anything on the boat side harness that does not match this diagram could be doing many strange things<br /><br /><br />

<br /><br />i can e mail you a bigger one <br /><br />tommays

 

[jeff13601]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

That deffinately should help him alot.

 

[ntheyer]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

I have this exact schematic. I just got back from the parts store and replaced the solenoid. So now I have new slave solenoid, new starter solenoid and a starter that works when bridging the starter solenoid. The purple wire only gets hot once connected to the starter solenoid, otherwise it stays cool when ignition is on. I don't understand how it's getting grounded when attached to the solenoid. I still only get a click from the slave solenoid when trying to start the boat. No actual cranking.

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

well the purple wire is not supposed to go to the starter solenoid only the 4 places i posted above<br /><br /><br />now there is that red/purple wire that comes from the 50 amp circut breaker and goes to the slave solenoid ,alternnator and feeds red/purple 6 which should go to the controls and feed the key switch and stuff and black 1 which should be the common ground for the controls<br /><br />you need to sit back and study for a while till it makes sence to you<br /><br />you might even need to make a few small drawings of each circut so its easy to understand<br /><br />you need to be real SURE you did not mix up any purple and red/purple wires up by the controls <br /><br />tommays

 

[jeff13601]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

The purple wire that is getting hot is the resistor wire that is going to the positive side of the coil. I believe that resistor wire drops your voltage going from the starter to the positive side of the coil. Remove the grey wire on the negative side of the coil and tell me if it still gets as hot.

 

[tommays]

Re: Swap from 1974 Mercruiser 3.0 to 1995 HELP!!! PLEASE!!!

there should be no resitor wire its a different system NO points <br /><br />tommays