1974 2000 series running problems

[Soundguy]

ASSUMING you have the correct resistor wire on the tractor.. then a generic 6v coil like a napa IC8 is fine.

OR if you omit the resistor wire.. and go straight.. then a REAL 12v coil like a napa IC14SB is fine.

all depends on what is in your wire harness.....

 

[Soundguy]

Well I guess I should ask this. Will I have screwed up any wireing now that I have put a 12 volt coil in the system or will putting a 6 volter in fix my problem??? I have my fingers crossed for the latter!!!

IF you still have the resistor wire in there.. and you have a 12v coil in.. you will have weak spark.

that said.. the new holland coil for a gasser 3 cyl is going to be marked for use in a 12v system.. even thouh inside the palstic case.. its a 6v coil. reason is they know there is a resistor wire inthe harness.

 

[Howard707]

OK Thanks, I will check out my manual and trace the wireing harness. Again, thanks for everything, Howard

 

[Howard707]

Hey Soundguy, now I am confused. I have the shop manual with the diagrams. Yet I have no idea what I am looking for in the harness. There is one wire that comes from the coil that has a thickened part in it about 1 and 1/2 inches long it is manufactured into the wire and possibly may be a resistor that you are speaking of. Any help you can give to help me identify what I am looking for? I hate to sound so stupid but, I just don't have any idea how to identify this item (ball of resistor wire)

 

[Soundguy]

the original resistor wire was just that. a resistance wire.

I'd have to see what you have before hazarding a guess.

 

[Howard707]

Hey Soundguy, I do believe that the issue was fuel. First, the shaft that runs the new fuel pump was most likely wore out and not allowing the pump to pump a proper flow. Second, when I put the electric fuel pump on, it was too large and pumped way more that the specs called for. I hooked it up as gravity fed and started it and it ran good for a minute or two and then started its crud again. Within a few minutes it cut off and I could not start it again. This is AFTER I installed the new 6 volt coil as suggested. Then like an idiot, I realized that it was bone dry on fuel. The clear in-line filter that I installed for the gravity feed was still slam full. After I filled it back up with fuel, I started it up and it runs like a champ. Now with all that being said, I am not sure if it is actually the fuel that was the problem OR the coil!!!! I used it yesterday for a couple of hours and today for several hours and it has run like a champ. When I cut it off, I reached down and grabbed the coil, it was hot as a fire cracker. I do not know if I should leave it on or switch it back to the 12 volt??? I have had a 12 volter on it for a couple of years and now I don't know what to do. ANY SUGGESTIONS? I can not seem to find a cluster of wire in the harness. I've checked from the coil to the starter to the solenoid. If I have good blue-white fire with the 12 volt coil it should be ok? What will happen to the 6 volt coil if I leave it on? NAPA did not carry the IC8 that you referred to they did have a IC7 that matched up to the original part number. This IC7 has a built in resistor too. You have been a GREAT help to me through the past couple of years and I wish I could at least shake your hand. In my book, "you ARE the man"!!!! I wish I could help you out in some way as you have been gracious to me. If you are ever coming to VA Beach or close, let me know and I will treat ya to dinner, The Comedy club, Bush Gardens or what ever you and your family feel like doing!!! We have tons to do in Norfolk, VA too and that's just minutes from my location!!!

 

[Howard707]

When I said I checked to the starter, I meant that I checked to the starter switch

 

[Soundguy]

an IC7 DOES NOT have a built in resistor.

it says it is suitable for 12v WITH EXTERNAL RESISTOR

If you can get good spark with a 12v coil.. I'd say the resistor wire has been removed or bypassed.

one thing you can do is to ground points or bump engine till they are closed and then take a volt reading at the top of the coil.. if it is bat volts.. there is no series resistance. if it is less than bat volts.. say.. 8-10, then there IS sereis resistance.

 

[Soundguy]

ps.. if you opt for an IC7.. get the IC7SB.. it is 23$ vs 48 $

 

[Howard707]

Before I made another idiot of myself I went and double checked the writing on the coil. The coil #IC7SB 6 volt has an internal resistor and an external resister is not required. My Spanish is not the greatest but, it even says the same thing in Spanish.
If I checked the plug spark with the 6 volt it should be the same as with a 12 volt?
one thing you can do is to ground points or bump engine till they are closed and then take a volt reading at the top of the coil.. if it is bat volts.. there is no series resistance. if it is less than bat volts.. say.. 8-10, then there IS sereis resistance.

You do mean if I check the coil where the coil wire runs from the coil to the distributor right? Meaning if it is regular battery voltage then there is NO resistor and if it is in the range 8-10 then there IS a resistor within the harness? BOY, I sure must sound dumb!! Trust me though, I am smart in most mechanics yet, when it comes to electrical I am more or less a novice working towards a better understanding. Thanks again