I have recently purchased a 2008 KQ 450. It rolled over to 1000 miles so I changed the oil and filter. I noticed as I was taking the plug out it was very tight initially then it felt like it just gave and then it was very easy to turn. When I got ready to put the plug back in it never got tight at all. Almost no resistance screwing it back in. Now it's holding oil buy it has a very slow leak. In 4 days it has leaked maybe a half cup. So I'm really not wanting to tap it out. A guy at work told me to buy a new plug and it should work? Don't make sense to me. Is there a fix that a beginner could do? Any help would be much appreciated. Sorry for the wall of text.