2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 329Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 329

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CYLINDER HEAD
1 Tie piece of thread (or other non-conductive material) onto the thermostat2 Suspend the thermostat in waterHeat water slowly while observing the thermostat

a -Thermo

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