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YEA ment to say already called TJ tried adapters in the past and melted them. theres got to be some ...... some where out there....somebody only if i could read japanese or know somebody in japan. Ive even tried the NGK web sight in Japan...
I guess the only option left is estate and garage sales then. I have two left and when they are gone I think I will see if a machinist can up grade the head to smaller threads.
Also try old snowmoble restorers. From what I understand that is what used the big plugs first.
the 14mm head is super affordable, especially if you plan on having machine work done. ive got a few different 14mm plugs we're gonna use during testing,(suggested by tj) the 10 are nowhere to be found, have checked every avenue on the web, out of stock and discontinued!!! kevin
I was fishing through the sparks plug isle at the local auto parts store and came across an 18mm spark plug that NGK still makes in several heat ranges. They are NGK AB8 they also had them in a 7 and a 6 heat range. I picked up a pack of the 8's and i plan on trying them in my yamato when i get it put back together.
Has anyone tried these plugs?
They are a little different than the R8102A-10 plugs so i am not sure how they will run.
here's a link if someone wants to look at the specifics...
i just found some champion plugs that crossed with the ngk that was discontinued. plan on trying them in tabor and will have some extras if any body needs any .I will post my results when i get back . hopefully ive found a cure for this problem i dont want to have to run adaptors or buy a 150 dollar head just because ngk said we dont use enuff of them to keep saling them thats why they are discontinued because there is not that much a demand for them i told the man to tell his superviser to give me a number that i could start passing out to people about the issue .and see how much of a demand there is for the plug. thats some bs not enuff demand yea......
Try Wilburt Wahl--French Creek Marina in Clayton New York---315-686-2265. He has all kinds of older plugs--was in there yesterday on way back to Canada--cheers Bill.
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