mike1972chev
Well-known Member
Hey, (It has been awhile!) I am a little ashamed to have to ask questions on this one,but here goes. I have recently replaced my original 6 Volt IH coil with a replacement 12 Volt (2.8 Ohm) from Steiners part # IH 237 The ORIGINAL reason for doing so was the coil would quit firing after getting warm from use.(ORIGINAL coil was ballasted correctly for 12 volt conversion to a total of 3 OHMS.)
Well... flash foreward to the NEW IH 237 Steiners coil being installed.It TOO is quitting after about a 20 minute period of use????? (THIS coil was ALSO properly ballasted with a .5 ohm resistor to get it in the 3 ohm range)
So now I am thinking I got a bad one???? AFTER the coil cools off for about 20-30 minutes ,it now runs like a CHAMPION again,but then quits after about the 20 minute run time as has been the case. I IMMEDIATELY,on the spot quickly swap coils after it quits to another stock 12 volt coil and it runs amazingly!!!!(THIS coil being a larger bodied 12 volt coil like a 12 V Delco that Ohms about 1.7 so I ballasted accordingly)
Well,I mount the latest,larger bodied automotive coil and run IT for awhile......... IT quits firing strong after about the same time as the others and we have no ignition once more.
I have since did some updates I wanted to do anyway, Pertronix ignition conversion,(Points looked BAD and slightly burnt)and a brand new set of NGK plugs..... STILL quitting after about the same 20+ minute run time and NONE to WEAK fire out of the coil.
After everything cools off...... RUNNING again?????
Only thing I have NOT done is plug wires,but the ones are on it are recent(like a little over a year ago and NOT much use.) I want to check resistance in them,but want a new set to have anyway. I am also considering a 3 ohm Pertronix coil as well,but am NOT convinced this will cure anything at all????
I can find no grounding issues in the VERY simple wiring of this tractor either.
I am loosing my mind a bit on this one.. Any ideas????
Well... flash foreward to the NEW IH 237 Steiners coil being installed.It TOO is quitting after about a 20 minute period of use????? (THIS coil was ALSO properly ballasted with a .5 ohm resistor to get it in the 3 ohm range)
So now I am thinking I got a bad one???? AFTER the coil cools off for about 20-30 minutes ,it now runs like a CHAMPION again,but then quits after about the 20 minute run time as has been the case. I IMMEDIATELY,on the spot quickly swap coils after it quits to another stock 12 volt coil and it runs amazingly!!!!(THIS coil being a larger bodied 12 volt coil like a 12 V Delco that Ohms about 1.7 so I ballasted accordingly)
Well,I mount the latest,larger bodied automotive coil and run IT for awhile......... IT quits firing strong after about the same time as the others and we have no ignition once more.
I have since did some updates I wanted to do anyway, Pertronix ignition conversion,(Points looked BAD and slightly burnt)and a brand new set of NGK plugs..... STILL quitting after about the same 20+ minute run time and NONE to WEAK fire out of the coil.
After everything cools off...... RUNNING again?????
Only thing I have NOT done is plug wires,but the ones are on it are recent(like a little over a year ago and NOT much use.) I want to check resistance in them,but want a new set to have anyway. I am also considering a 3 ohm Pertronix coil as well,but am NOT convinced this will cure anything at all????
I can find no grounding issues in the VERY simple wiring of this tractor either.
I am loosing my mind a bit on this one.. Any ideas????