1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 131Get this manual
POWERHEAD INSTALLATION ON LOWER UNIT Secure power head to drive shaft housing with 0ck washers and he" nulS and hex boh following correct torque sequence shown below Torque hex nut and bolt 1030 Ihs[I(40.7
NO TE: If powerhead nuts afe not torqued in sequ.ence shown, you may get minor water leakage between powerhead and drjlMJhaft housing
FRONT OF ENGINE