Mercury Repair Questions? Ask a Mechanic for Answers ASAP
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First you need to remove the upper radiator hose and bypass hose. Then remove the thermostat housing bolts and remove the thermostat. On install make sure the jiggle valve of the thermostat is in the upright position. Click on the link. When refilling the system remove the air relief plug on the engine. See the pic.
Yes you are correct and there are a few steps to follow to make the job easier. I have enclosed the step by step instructions.