1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 88Get this manual
TORQUE SPECIFICATIONS Cylinder Head Boltl 150 LbIn(17 N.m) Add Light all to Thread,
Crankcase Cover Bolts 30 Lb Flo (40.1 N.m) Add Light all to Threads
Powerhead Mounting Hex Nut30 Lb,Flo (40.1 N.m)