Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 100Get this manual
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Cylinder Head Bolts 180 lbin(20.3 Nm) Add light oil to threadsIMPORTANT: Reier to REASSEMBLY lor proper torque sequence Thermostat Cover Bolts 150 lbIn(16.9 Nm) Apply Locquic Primer and Loctite 242 (o