I have a 1988 Force 85HP outboard and when I was winterizing the boat I noticed the plug on the bottom of the motor was stripped when I went to drain the gear oil. I was able to get it off and back on but it needs help. Is there a part number for this or do I need to get a new one machined? This is the plug on the bottom of the motor you remove to drain the lower gear oil. It is just a threaded plug with an Allen Wrench. not sure how to spell Allen wrench.