autolite plugs

[lee9588]

I have been using champion d-16 plugs in my A and G and 70 and they don't seem to last very good and I have heard that autolite plugs work much better what number of autolite plug would you recommend?

 

[Mark Poss]

3076 or 3077 have worked good for me in my 2 cyl. Good luck Mark.

 

[Deeredale]

The 3077 is an excellent plug.

 

[ram ranch]

I like AC C-86 or C-84, just switch to NGK in my 4000 gas but don't recall the number.

 

[Mike Aylward]

Lee, you have 18mm plugs and the 3076 and 3077 are 7/8" plugs. The plugs you will want are 3116 in a non-resistor or 386 or 388 in a resistor plug. The 386 is (I believe) the direct crossover plug from a D16, even though it is a resistor plug. I have used all of them in working and non-working tractors and they all work. My first pick would be the 3116, though. And you heard right..the Autolite plugs are a better plug IMHO. I have had easily half of the last Champion plugs I used be bad right out of the box..never were good to start with. I have had good success with the Autolites and have used them for many years. Hope this helps. Mike

 

[630rich]

I have used AC C87 and C88s, like the 88s the best, I have also had good luck with champion D21s, I have a 630. good luck

 

[Anonymous-0]

I believe if you look in the Champion book you'll find the D16 is only recommended for extreme heavy service in the A, B, D, G and H tractors and the D 21 plug is recommended for average service! I'm not sure about the 70 'cause my 70 is Diesel but suspect the same may be true of the numbered series tractors.

If they will physically fit, Champion offers the D 23 as an option for light service in A, B, D, G and H tractors! They are a good bit longer than their cooler D 16 and D 21 cousins and can be tough to fit into the tractor!

Maybe I'm just lucky but I have seldom fouled a D 21 and have never had a D 23 fail me! My local AutoZone ordered me D 23's by the 6 plug box last time I needed some. I've sold or given most of them to friends when their D 16's fouled out. One friend was glad to receive one pair at the state of Ohio plow contest. His 49 A went two rounds on only one cylinder before it finally gave up at the home end.

My TSC store only occasionally has D 21's but never has D 23's on hand. They always have D 16's in stock but using D 16's is just asking for trouble! The tractor MUST be run hot, lean, hard and be in top notch shape to run for long with Champion D 16 plugs because today they're generally just plain the wrong plug for lettered series JD tractors!

I hope that helps!

Later.

 

[kendak]

one of my "A's" had to be pulled off every time...took the Champion plugs out & put in a set of used 3116 ...cranks on the second roll of the starter every time ..Kent

 

[Pappy]

Use Autolite 3116.

 

[Mike M]

There are a few models of tractors ( not sure if it is the A or B of 1941-1946 ? or both ) that the D-23 plug which is longer actually fits better so you can get a wrench on them.
I mostly use auto-lite 388 as they were plentiful and cheap to buy and I had good results with them dispite learning hear that they are resistor plugs.

 

[Anonymous-0]

Use AC or Autolite, which ever you get. I've never had good luck with a Champion in an old JD. Only thing a Champion is good for is lawnmower!!!

 

[ncpapaul]

My two cylinders crank best with Autolite 3116 and my batteries aren't charged up all the way most time, but with the 3116 plugs, they fire up on slow starter roll, Paul

 

[lee9588]

Thanks for the info I will be trying some of the plugs you suggested