I decided to change my gearcase oil today because I'm not sure if it was ever done. It is a 15hp 2 stroke evinrude '88. After getting the oil in and putting the plugs back in the lower plug just keeps spinning. I'm sure I didn't crossthread it and it will neither go in or out. It just spins. What am I looking at here? No oil has been leaking out of the plug. Is it good to run for the time being? (fishing trip coming up tommorow). Thanks for any help.
Dean
Dean