3076 vs 3077

Dennis P · Sep 11, 2022

I have a TC-KT with a High compression head on it. I fouled a 3076 plug that was due to carbon fluff. Would the 3077 plug be a better option? I dont pull any heavy loads, just to drive around on show grounds and here at home to amuse myself. Thoughts?

J Hamilton · Sep 11, 2022

The 3077 plugs are no longer availible. A Champion W89D is the only comparable plug that I know of. It has a very long electrode so be sure you have clearance for it

Duey C · Sep 12, 2022

Some guys have had good luck on ebay or some such to find new 3077 plugs but J's right. They're all done/obsolete.
Your KT should like the W89D (NAPA 589) and there "should" be room for the electrode.
The electrode does stick out about a half inch past the threaded base.
You might have to buy a box of 8 plugs if your store don't stock them, my store doesn't so I buy a box at a time. 8 bucks apiece.
I didn't like Champ's but put a set in my IH gas-start Diesel and they still work very good. That was 30 years ago.

3076 vs 3077

Dennis P

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J Hamilton

Well-known Member

Duey C

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