No. And this was discussed in another thread on the very first page of the forum, just a couple of days ago!
You want R5300A's.
Actually, more accurately, it is possible to use the R7282 (with the corresponding cap), but you need to be sure you get the correct version. The R7282 usually comes without a gasket.
The "correct" plug for the NSR250, as specified by HRC, is the R5300A.
_________________
Andy.
NSR-WORLD.COM
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