Mercury Zephyr Engine Coolant Thermostat Replacement

205 Degrees F Higher Alternate Temperature Replacement

160 Degrees F Alternate Temperature Option

180 Degrees F Alternate Temperature Option

160 Degrees F Alternate Temperature Option

195 Degrees F OE Specified Temperature

195 Degrees F OE Specified Temperature

195 Degrees F OE Specified Temperature

160 Degrees F Alternate Temperature Option

180 Degrees F Alternate Temperature Option

180 Degrees F Alternate Temperature Option

160 Degrees F Alternate Temperature Option

180 Degrees F Alternate Temperature Option

195 Degrees F OE Specified Temperature

180 Degree; Alternate Temperature

195 Degree; OE Temperature

195 Degrees F OE Specified Temperature ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."

160 Degrees F Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."

180 Degrees F Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."

195 Degree; OE Temperature

160 Degree; Alternate Temperature

180 Degree; Alternate Temperature

192 Degrees F Includes Seal OE Specified Temperature

160 Degrees F Includes Seal Alternate Temperature Option

180 Degrees F Includes Seal Alternate Temperature Option

195 Degree; OE Temperature

180 Degree; Alternate Temperature

192 Degrees F Includes Seal OE Specified Temperature

180 Degrees F Includes Seal Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."

192 Degrees F Includes Seal OE Specified Temperature ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."

195 Degree; OE Temperature; Seal included

160 Degrees F Includes Seal Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."

160 deg.; Race Only

180 deg.; Race Only

195 deg.; Race Only