Spark plug for my Snapper 7800948 lawn mower.

Philadelphia :LI have a Snapper 2014 e8. 75 190CC. And the number off the tag on it is. 7800948. Long story short, tree hit my garage and all my tools are scattered all over. There's no way I can find my wrench to pull the. Plug out. And I don't have the right size socket. I'm having trouble getting it to start and it stalls, so swapping this out would be the most likely thing. Before I take it to a repair place and cover all the charges. It probably does need a new spark plug. As the tree hit that garage a year and a half ago and Long story short, there was a drought so I didn't use the lawn mower much. And I know the plug's a few years old. I searched the Internet but I cannot seem to find any information of what is the correct plug. And I notice one thing says. I guess there's a model number. But then when I find a manual they give different numbers for the gap. So I'm not sure what I'm looking for to be honest with you. And unfortunately I can't get the plug out of there.