Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 586Get this manual
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LEFT HAND NON-RATCHETING
DO NOT over-torque nuts and bolt, as this could cause cover to crack during operation14 Torque water pump nuts to 50 Ibin(6.0 Nm), and water pump bolt to 35 Ibin(4 Nm)15