71 IH 1110 Distributor and Questions

Discussion in 'General IH Tech' started by Bcmyers21, Apr 8, 2020.


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  1. Bcmyers21

    Bcmyers21 Farmall Cub

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    I have a 71 1110 pickup with a 392 in it. Attached are a couple pictures of the distributor and a Mark 10 capacitive discharge ignition. Can anyone tell by the picture what brand distributor I have? I am not familiar with the Mark 10 but by the looks of the wiring job I can only assume it is aftermarket. I am having ignition issues and am wondering if I can disconnect the Mark 10 and replace points, condenser, cap, rotor, and start over. From my limited knowledge and research I think the Mark 10 is a performance add on that is not really necessary with a properly tuned and setup distributor. Thanks for the help! I'm located in Troy Ohio FYI and am slowly becoming addicted to IH vehicles.

    IMG_3528.JPG IMG_3529.JPG IMG_3530.JPG
     
  2. Jeff Jamison

    Jeff Jamison Lives in an IH Dealership

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    You already have points in there,its a curved points holley,no idea what that ignition thing is,is it your coil.
     
  3. Greg R

    Greg R Lives in an IH Dealership

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    Mark 10 is as you say; a 1960s 1970s speed part that boosted coil voltage and is still points triggered. You can go back to stock. For all the high voltage these things touted, a firing cylinder charge is only gonna use the minimum and no more. If it needs 8K to 10K volts, that's what it'll use regardless if you're trying to pump 40K from a "hot" super chromed coil.

    You should use a factory wiring schematic from a Service Manual to make sure you got the ciruits and all the Eelecktrons lined up and in order so there's no shorts or run-ons.

    As to points, I had a hard time finding good ones. It seems most have gone to a nylon type rubbing blocks which I think is a tad weak being so close to the thermostat. For that reason I have upgraded to a Pertronix Ignition points replacement. It's been over 12 years with the same module and no complaints.

    Without a side view, the distributor looks like a Holley distributor. Some CDI modules or versions, I think this make, had a switch to turn it off and go standard ignition.
     
    Last edited: Apr 8, 2020
  4. mallen

    mallen Y-Block King

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    If it's a CDI triggered off the points, it offers on big advantage. The points won't be carrying much current. Points that are triggering a CDI last a very long time.
     
  5. Bcmyers21

    Bcmyers21 Farmall Cub

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    Thanks. I am going to replace the rotor button now that I know it's a Holley. I got number 8 cylinder at TDC last night and confirmed that the point gap was set at .016". After putting everything back together I have not spark at all. The felt wash below the button on the distributor did fall apart so I guess that is a possibility on the loss of spark. I'll also replace the condensor in distributor. There is also a condensor bolted next to the coil but it has never been hooked up since I have owned the truck. The truck has always ran, just not really well and has never idled at low enough RPM. I've worked through some fuel and carb issues but am now going through the ignition. Thanks for all the help so far!
     
  6. 1975IH200

    1975IH200 Y-Block King

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    Delta Products Inc., P.O. Box 1147, Grand Junction, Colorado 81501.
    The "Mark Ten B" had the switch to switch back to points.
    The "Mark Ten" had to be disconnected to switch back to points.
    There was also a "Mark Ten C".

    FYI, the radio noise suppression capacitor must be disconnected from the coil when the "Mark Ten" is installed.
    Edited for typo.
     
    Last edited: Apr 9, 2020
  7. Bcmyers21

    Bcmyers21 Farmall Cub

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    Thanks for all the feedback. I assume the radio noise supressor is what i thought was a condensor attached to the coil. It is unhooked. My plan is to unhook the Mark 10 CDI, replace points, condensor, plugs, wires, coil and rotor (cap looks fine and new). I'd like to rule the Mark 10 out for causing any issues and can always hook it back up later after I have everything running smooth.
     
    Last edited: Apr 9, 2020
  8. 1975IH200

    1975IH200 Y-Block King

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    Yes, that is the radio suppression capacitor. Use it if you hear ignition noise in the radio speaker. It cause no harm hooked up with points/condenser.
    Sounds like a plan. Let us know how it turns out.
     
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  9. wjajr

    wjajr Binder Driver

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  10. Bcmyers21

    Bcmyers21 Farmall Cub

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    I do hear a constant high pitch noise coming from the mark 10.
     
  11. jordandoc

    jordandoc Binder Driver

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    For what it is worth, let me throw in my 2 cents! I have several IH Scouts and pickups, all with strongly built 392's (except for one 345) and ALL with capacitor discharge ignitions, the Crane HI-6. I gave up on points a long time ago. The original IH electronic (Gold Box) ignitions were not very reliable and the Prestolites in later Scouts did much better. However, the aftermarket Pertronix conversion is very reliable and a much better alternative to points. I went one step further! I use the Pertronix conversion to trigger my Crane HI-6 CD ignitions. With low resistance wires, the CD ignitions give a much hotter spark when coupled with the high voltage epoxy mounted coil. In fact, these newer CD ignitions are multiple spark, firing several times within 20 degrees rotation of the crank up to 3000 RPM. Then it's one longer spark. Instead of the little orange/yellow spark one sees when pulling the coil wire on the running motor, with the CD I see more like a "flame" and a loud "crack" every time it fires. I might add, when you try pulling the coil wire to visualize this, be very insulated because if you are leaning against the body, you won't need Viagra! The spark jumps a much wider gap than the OEM ignition and, living in Montana, I notice a significant improvement in well below zero starting without using the block heater. You have to work at it to flood it out when it's cold. Seems to fire wet plugs with ease.
    The disadvantage is that you have to replace the wires with the low resistance spark plug wires and you may need to add an interference suppressor if you listen to the radio (which I don't). Another disadvantage I have had is that a few of my vehicles seem to burn out spark plugs a lot faster. This may be due to a fuel mixture issue (or too heavy of a foot). Incidentally, spark plug gap should be increased to .045 (up to .060) for peak performance although the benefit from any gap over .045 is negligible. Bottom line...I would never go back to points! Other IH owners may have different opinions or have had problems but my experience has been very good and I've been using them in several vehicles now for 18 years. Never had one go bad!
     
  12. RinTX

    RinTX High Wheeler

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    Is the GM HEI a form of CD ignition?
     
  13. mallen

    mallen Y-Block King

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    No, as far as I know the HEI is a inductive ignition. Just a slightly more optimized one. I have a holley curved point in mine. I use a mopar pickup coil and the reluctor wheel from a ford to trigger a ford duraspark. I had a MSD but the box went out and i had a Ford duraspark box around so I used that. (the duraspark I had in the parts box was actually iffy, so that led to lots of fun, but thats a whole other story) I actually tried a GM hei module, but it didnt work. I dont know if I got a bad one, but since I needed it running I just got another duraspark box and called it good. Ill probably get another MSD box at some point. I wrote up the conversion at some point in the past and it can probably be found. My conversion was similar to bill Hamiltons writeup, with a few differences that allowed me to do it without removing the distributor from the vehicle and without having to have a cap with a hole drilled in it to line everything up.
     
  14. Bcmyers21

    Bcmyers21 Farmall Cub

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    Well it is firing on all cylinders now. Timing is close to TDC on number 8 and it seems like it is running strong and has good throttle response. My problem is, I cannot get it to idle at low enough RPM. I have a Holley 4150 4 barrel carb. I have been adjusting the secondary throttle plate and can't seem to find a happy medium. Any tips on tuning these carbs? I have had it on and off about 20 times today. Can't seem to get lower than 1400 rpm. Other than that it is running strong. Thanks for all the help troubleshooting the indention. FYI the distributor cap was the main problem with my ignition. The old Mark 10 seems to be working fine.
     
  15. winchested

    winchested Y-Block King

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    Stuck on the high idle cam?
     
  16. Bcmyers21

    Bcmyers21 Farmall Cub

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    I don't think so because it will lower in idle as I push in the throttle/choke cable.
     
  17. winchested

    winchested Y-Block King

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    You need to set idle on a fully warm and off choke engine.
     
  18. Bcmyers21

    Bcmyers21 Farmall Cub

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    I have been attempting to. I have read to use the secondary throttle plate adjustment to set the idle on the holley 4150. I either haven't found the sweet spot or have some other issue in the carb.
     
  19. Bcmyers21

    Bcmyers21 Farmall Cub

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    I am wondering if I have a bad vacuum leak somewhere. There is definitely some amount of leak around the carb baseplate gasket. If i spray a good amount of carb cleaner around the base there is a slight increase in RPM. I'm wondering if there is another leak somewhere else too.
     
  20. jeff campbell

    jeff campbell Lives in an IH Dealership

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    Replace base gasket with the thick 1
     

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