Hey, I found a website for cross referencing plugs between manufacturers, and also identifying what plugs you can use, and need for your specific engine.
Use the "Vehicle Type" dropdown box and select lawn and garden, Then choose the BRAND you wish to use, then select CATEGORY. Go from there.
To Cross reference, type in the plug # you have in the front page of the site.
http://www.sparkplugs.com/
[web]http://www.sparkplugs.com/[/web]