Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 270Get this manual
POWERHEAD
Assembly of Reed Blocks to Intake Manifold
aTorque to 105 lbin(12 Nm)
Assembly of Exhaust Divider Plate to Block
1Place exhaust divider seal into slot in block2Install exhaust divider plate with gasket3Clean bolt threads with Loctite 7649 Primer (92-809824)4Apply Loctite 271 to bolt threads and torque bolts to 16.5 Ibft(22 Nm)5Torque exhaust divider plate bolts in following sequenceTorque bolts to 16.5 lbft(22 Nm)Add Loctite 271 to threads