On 12/13/2014 9:22 AM, Stormin Mormon wrote:
On 12/12/2014 7:42 PM, Danny D. wrote:

Generac has no clue but they said it 'could' be a typo.
All we know is that the R12YC doesn't exist.


Oddly, I have an old Champion catalog. No
such plug that I could find. Wish I was
more help.

Generac sells a service kit for each generator including spark plug, oil
filter, and air filter. Just buy it and save yourself (and everybody
else) a lot of confusion.