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Super C.... Fouling Plugs

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Mark

09-24-2001 17:40:50




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Have Super C, with No. 2 & 3 fouling plugs. When I change them around, 2 & 3 still foul. Have used D-15Y & D-18Y. Any suggestions? Different plugs? Have not taken a compression test yet??? What should be the average? Starts right up?? Thanks!




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Bob M

09-24-2001 18:14:41




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 Re: Super C.... Fouling Plugs in reply to Mark, 09-24-2001 17:40:50  
Les' advice is right on. But if you can't find D23 plugs, D21 (or AC C86) will likely do the trick (they did for me...)

Other stuff to check: If you see any hint of black in the exhaust, the carb is set too rich and will quickly foul plugs - especially the two center cylinders. Lean out the power screw at governed speed, and the idle mix screw at idle until there's no trace of black. Make sure you have a themostat installed and it's working - a cold engine will tend to foul plugs over time. Finally if your ignition wires are carbon core (radio surpression or "resistor" type) throw 'em out and replace with plain copper core wires.

Good luck!

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Mark

09-24-2001 20:28:15




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 Re: Re: Super C.... Fouling Plugs in reply to Bob M, 09-24-2001 18:14:41  
Bob: what do you gain by using solid core copper wire? Does it give a hotter spark? What do you folks think of the new electronic ignition add on sytems for the old Farmall Dist. type ignitions?



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Bob M

09-25-2001 04:58:28




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 Re: Re: Re: Super C.... Fouling Plugs in reply to Mark , 09-24-2001 20:28:15  
Mark - It's been my experience (and many others too...) that resistor wires simply do not perform as well as solid copper wires on older 6 volt and magneto-equipped engines. This is ESPECIALLY so when resistor wires get old, dirty and wet.

Regarding add-on electronic ignition systems - they work fine. However as long as you properly maintain the stock ignition, an electronic offers no significant performance increase. Only advantage is electronic eliminates occasional breaker point adjustment/replacement.

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tony

09-24-2001 21:37:43




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 Re: Re: Re: Super C.... Fouling Plugs in reply to Mark , 09-24-2001 20:28:15  
I put the electronic ignition conversion on my H. It was really very simple to install. But, it's not a miracle cure. My H started very easy with points set up correctly, and I would say starts the same with the electronic conversion. So far I haven't really noticed any difference in the running performance. However, I'm waiting and hoping there is an improvement on the damp/wet days. I used the Pertronix kit, purchased it from a car place in Moline Ill. for about $70 including shipping. I tried ordering directly from Pertronix but they said it was cheaper to go through a dealer, then dealer ended up having it drop shipped.

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Les Repair

09-24-2001 17:57:28




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 Re: Super C.... Fouling Plugs in reply to Mark, 09-24-2001 17:40:50  
If you don't pull the tractor very much there are also D23 plugs. These are pretty hot, but they will work. Your parts store will probably tell you there is no such thing, but there is.



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Jere Hummelgaard

09-25-2001 03:03:05




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 Re: Re: Super C.... Fouling Plugs in reply to Les Repair, 09-24-2001 17:57:28  
My Dad's Super C had the same problem. Hydraulic fluid was also disapearing. He gained oil in the crankcase (A LOT)! The seal on the gear shaft of the hydraulic pump was leaking, the crankcase would over fill by as much as 1 gallon and build up pressure enough to blow hydraulic fluid past the piston rings (weak rings) and foul the plugs. I replaced the seal and all the problems including the fouling plugs have gone away.

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Mark

09-25-2001 06:26:35




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 Re: Re: Re: Super C.... Fouling Plugs in reply to Jere Hummelgaard, 09-25-2001 03:03:05  
The fouling of the plugs, is a dry soot type foul. There is no apparent wet type oil deposit. I am going to install the hotter plugs today, I found D-21's, no D-23 available locally. I will post progress. It seems that this problem is pretty common. I forgot to add that the engine has been converted to 12v. I have also installed new ignition wires.



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Mark

09-25-2001 14:25:05




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 Re: Re: Re: Re: Super C.... Fouling Plugs in reply to Mark, 09-25-2001 06:26:35  
Changed out plugs, using D-21's. tractor runs a lot better. Exhaust still has some black "rich" smelling smoke. I tried to adjust idle screw, but it seems to still produce black smoke no matter how much I screw it in? Checking the plugs, they have some black soot on no.'s 2-3 & now 4. Like I said, it runs a lot better, but will only be a matter of time until these plugs foul??



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J.D. Humm

09-27-2001 15:00:03




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 Re: Re: Re: Re: Re: Super C.... Fouling Plugs in reply to Mark, 09-25-2001 14:25:05  
We used to farm with gas powered IH tractors in the 60's. Really didn't have fouling trouble back then. I think the reason was we actually pulled those tractors hard and the higher engine temperatures prevented plug fouling. Of course if you needed a ring job they would foul anyway. Seems like when the big diesels took over and our gas tractors went to lighter duty is when we started having plugs foul frequently. Heck we even used to plow with Super C's and never had plug trouble. For some reason it seems the 6volt Super C we have runs better than the 2 12v Super C's we have. It also starts just as easy if not easier. Thinking of switching the other 2 back. If everything is in good shape a 6 volt system will start the tractor ok, even in cold weather.

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