Two Spark Plug Questions

[waterbill]

1) I went to my local auto parts dealer for 3 NGK B8HS-10 plugs for my Yam 90. They only had B8HS, but told me it is the same plug. Is this ok to use?<br />2) The same guy says to put a popular anti-sieze compound on the threads. An OB mexchanic once told me this stuff has copper particles in it and therefore is detrimental to an aluminum-threaded assembly. Would common waterproof grease be OK to use on spark pllug threads?<br /> Thanks for any advice.

 

[backdraft]

Re: Two Spark Plug Questions

Waterbill, Don't bother using those plugs as you'll be taking them out later. The number10 plug has a rather long nose on it to put the spark further into the chamber. Use only the BHS8-10. nevjb

 

[seahorse5]

Re: Two Spark Plug Questions

the -10 at the end of an NGK sparkplug number means that it is gapped at 1.0mm or around .040". Regular NGK plugs are normally gapped around .025-.030".

 

[rodbolt]

Re: Two Spark Plug Questions

hello <br /> those plugs will work ok. you will just have to carefully change the plug gap. I dont use any sealer/anti-sieze on the plugs, if you need to then use one with a nickel base not copper.<br /> good luck and keep posting