New to the forum fellas-- I have a GX200 on my pressurewasher, it has  the NGKBPR6ES in it fron new / factory. I am getting a replacement air filter element and it comes with a plug. But the plug is the 5ES instead. Will this hotter plug POSSIBLY do ANY damage? I use it @max rpm 98 % of the time for up to maybe 45 min-- to 1 hr @ a time
Thanks

I'm guessing this is an aftermarket "Kit" (filter and plug)?
 
I would NOT put in a hotter plug, there's no reason to.
The 6 came from the manufacturer and frankly, I've NEVER seen a
5 plug in ANY MACHINE-Never.  
 
Also, get your new "6" plug from a shop, or auto parts store. 
There's often copy cat parts (from China), so use due diligence.
 
.

Thanks Scott
Yes it is a kit but not aftermarket- both items are in honda packaging. I will just give the plug away or toss it because I really didnt expect to get it-- just the air filter element