Spark plugs

Recently bought four new champion d16 plugs to put in my super m. The tractor had autolites in it before I changed them. The tractor is running rough at idle and wide open. Do y"all think I need to change plugs or is it a carb problem?
 
I would expect that plugs are the last item, I usually change one thing at a time.

Do you have plug wires in right order, sounds like 2 might be crossed.

Point gap might be off, make sure it is set to .020 if distributor.

Then check carb.
 
Take them Champions out and throw them as far as you can and put another set of autolites or AC Delcos in it.A buddy of mine just bought 6 Champions 2 were junk and he couldn"t figure out why it wouldn"t run right either until he changed them.
 
well was it running better before you changed anything?
no tune-up is complete without a compression check! this will tell you the engines condition and keep the guess work away.
also a valve adjustment is pretty much a standard procedure in a tune up also.{.017 hot}. many times i have found tight valves. as the valve seats wear the valve lash decreases. leaking valves will eventually burn and then you have a miss. points set to .020. timing set also then you adjust the carb.
as for the plugs inspect them and you can pretty much tell if a cyl is not firing by the plug being wet or also black and carboned up. a good burning plug will be a brownish color.
also the carb may need a cleaning. so you see there is alot more to go through than just plugs. and if you throw them champs out i will take them as i don"t have a problem with champs.
 
Nothing wrong with champion spark plugs BUT you don't want a D-16. That plug was obsoleted on IH tractors in the late 60's. A D-15Y for regular plowing M, D-18Y for lighter working M and D-21 for dinking around. Kripes sake, they are all I put in these red ones running around here.
 
Before you start throwing money on parts take your timing lite and hook it to #1 wire and watch for constant flashing then go to the next wire and so on till you have observed constant flash on all four wires as your bushing in the dist could be worn thus intermitten fire going to the plugs.
 
To add to what Pete has said, I also run Champions in our 4 Farmall"s and have had no issues. I run D23"s in mine and they run good. In my H that burns oil bad they don"t foul out as often (bigger problems with that engine). Good luck!
 
Check your plug wires again for the right order. It's happened to me. I checked them THREE times, and could swear to God that they were in the right order, but the tractor still only ran on 2 cylinders.

On a FOURTH check, I discovered 2 and 3 were swapped.
 
I have a JD 70 and an IH 460 that I had run Champion D-16's in, and both tractors burn a lot of oil. Are you saying that the higher the Champion number, the hotter the plug and thus the less likely to oil-foul the plugs? I'm glad to know that there is something hotter than a D-16!
 
I believe that is how it goes, that is what I have been told. They do cost more, I pay about $6 a plug if I remember right. They are worth it for me though they work nice in my Farmalls.
 
You guys are lucky with your champs they used to be the go to plug but anymore everyone seems to be getting 1 or 2 bad ones in a bunch of 4 or 6.You will be lucky to find anyone who even stocks them here any more.I had a set of champs in my 400 after we overhauled I run them about 20 minutes and heaved them.
 
I run D-18Ys in both my 2444 and Super C and have never had spark plug problems with them. The Super C has a 6 foot woods mower on it which is a moderate load and the 2444 is used for the front end loader and rear blade so it rarely has much of a load on it. I did run D-21s in the Super C before I did an engine overhaul. It burned as much oil as the hydraulic pump leaked and the hotter plugs kept them from fouling with the oil consumption.
 

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