Well here what I found on the net. The XC92YC (STK No 980) is a non resistor plug gapped at .050 and the RC12YC (NGK BKR5ES (2460)) is a resistor plug gaped at .035. So the RC12YC would work fine as a replacement plug and would create less RFI noise in the area. Even Briggs tech support suggest just using the RC12YC. Here I sub the NGK 2460 plug as it has me stocking few plugs.
BTW both cost the same for me purchase from the distributor.
Yikes I need to order some 2460 plugs. I usually keep 16 in stock.
![1721593165361.png 1721593165361.png](https://www.lawnmowerforum.com/data/attachments/58/58157-5ca81b326ef9baebf59b499c373dc6a6.jpg)