Mercury Force 9.9, 15HP Outboards Service Manual, Page 115Get this manual
2Install exhaust cover, exhaust plate and two gaskets Position gasket (A)exhaust plate (8)another gasket (C) and exhaust cover (0) on power head Secure with eight screws (12 screws on later models) Torque to 90 lbin(10.3 Nm)
Install cyli nder drain cover and gasket