I have a exhaust leak on my 1998 GTS seadoo. About a month ago the bolts and nut backed out from the exhaust pipe so I went ahead and replaced the head gaskets and the exhaust gasket and new bolts and nut . I do not have a torque wrench but tightened them to what I thought was ok. I took to lake, took off seat and could see water spraying out (at BLUE arrow). I took my wrenches with me and tightened some more but could still see water spraying out and filling the hull. You can see its a little black in color where the BLUE arrow is. What should I do to resolve? Thank you in advance