Hi Larry, I think I'd ask the service dept of a outboard shop. The bolt is stainless and the housing is aluminum (I believe). I'm not sure any locktite would be appropriate or acceptable. I put checking the bolts on a list of things to do before I use it. Never had any looseness. The person who lost the motor was on another forum. However, after reading his post I looked at mine and determined it sure looks possible to me... Bill (SF)