Thanks all! I did verify that I have the Mazda M4-121G engine yesterday. It took a lot of digging on line. I read a TON of stuff and finally ran across some similar posts and other technical specs that led me to that answer. Getting verification here was the icing on the cake. Thanks again.
It's still crazy to me how difficult it is to figure out basic details, even with serial numbers, etc. I guess it is more about protecting the service industry than transparency. Imagine that!
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.