BUHX, BUHW, black/blue box??

[isnms]

'85 Force 85hp, model: 856X5L, sn: 4549

Hi, New to me Force 85. I need to service it and have a question about sparkplug:

The parts list says CHAMPION UL-18-V which crossreferences to NGK BUHX. I have read some threads about blue box not liking BUHX. Mine has black box.
So does that mean BUHX is good?
Is there an advantage in using BUHW?

And what's the detail on B9HS-10?

the older force 3&4 cyl motors...hard runnin ngk BUHW...NOT BUHX....lotsa trolling and no skiing....then use a B9HS-10....

 

[roscoe]

Re: BUHX, BUHW, black/blue box??

buhx should work fine.

 

[isnms]

Re: BUHX, BUHW, black/blue box??

Ok thanks.

I have BUHW from my other motor.
What would be the issue of using these? Pros/Cons