Went to change the plugs today on my 2006 175 Optimax and it’s been sitting without plugs for a while. I put the first plug in and it was tight to go in and I figured it was due to the weather. The second plug started tight again but by the second or third turn I knew something wasn’t right. I took the plug out and had metal shavings on the plug. I tried putting it back in straight but I think I only made it worse. It is only a few turns in the plug hole but I can’t get the plug to follow the correct threads. Can I just clean it up with a tap? Or is going to have to go to the shop?