Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 82Get this manual

Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 82

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Thermostat (if Equipped) Wash thermostat with clean waterUsing thermostat tester, similar to the one shown, test thermostat as follows: aOpen thermostat valve, then insert thread between valve and the