Good evening. I have a Z665 with a Briggs & Stratton 27hp motor. My stump gasket is leaking so I'm going to change it as well as all other gaskets and o-rings just to make sure I don't have to take the motor off again anytime soon. I'm going to change the o-ring behind the oil filter adapter but cannot find what the bolt should be torqued to. I have the technical repair manual but can't find it mentioned anywhere. Thank you for your help.