143°F Thermostat Kit, 2 Thermostats & 2 Gaskets – Mercury Marine V6 135–200 HP Outboards, OEM 75692Q2
143°F Thermostat Kit, 2 Thermostats & 2 Gaskets – Mercury Marine V6 135–200 HP Outboards, OEM 75692Q2 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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143°F Thermostat Kit, 2 Thermostats & 2 Gaskets – Mercury Marin...
143°F Thermostat Kit, 2 Thermostats & 2 Gaskets – Mercury Marine V6 135–200 HP Outboards, OEM 75692Q2 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 143°F (62°C) thermostat kit is designed for specified Mercury Marine V6 two-stroke outboards using two thermostats. It is listed for 135–150 HP engines from serial number A904646 and newer, 175 HP engines from serial number C100861 and newer, and 200 HP engines from serial number 6435503 and newer.
The kit cross-references Mercury OEM part number 75692Q2 and is identified in GLM catalog references as GLM 13340. Verify the complete engine model and serial-number condition before ordering; a part-number match alone does not confirm fitment.
- 143°F (62°C) thermostat rating.
- Designed as a direct replacement for the specified factory thermostat application.
- Supplied as a service kit with two thermostats and two gaskets.
- Intended for the listed Mercury Marine V6 two-stroke applications; it is not listed for DFI Optimax applications.
Part Number Matrix
Use the following verified reference to compare the kit with the original application.
| Brand or Source | Part Number | Reference Type |
|---|---|---|
| Mercury | 75692Q2 | OEM reference |
| GLM | 13340 | Aftermarket catalog reference |
Engine & Model Compatibility
Confirm the engine brand, model family, horsepower, stroke type, and serial number against the conditions below before purchase.
| Brand | Model Family | Rated HP | Stroke | Serial-Number Condition | OEM Reference | Notes |
|---|---|---|---|---|---|---|
| Mercury Marine | V6 outboard models | 135–150 | 2-Stroke | A904646 and newer | 75692Q2 | Listed application |
| Mercury Marine | V6 outboard models | 175 | 2-Stroke | C100861 and newer | 75692Q2 | Listed application |
| Mercury Marine | V6 outboard models | 200 | 2-Stroke | 6435503 and newer | 75692Q2 | Listed application |
Technical Specifications
- Product Type
- Thermostat replacement kit
- Temperature Rating
- 143°F (62°C)
- Quantity
- Two thermostats and two gaskets
- Installation
- Direct replacement in the applicable factory thermostat housing
- Engine Family
- Specified Mercury Marine V6 outboard models
- Stroke
- 2-Stroke
- Application
- Marine outboard cooling system
- OEM Reference
- 75692Q2
- Important Exclusion
- Not listed for DFI Optimax motors
What’s in the Box
- 2 x 143°F thermostats
- 2 x thermostat gaskets
Installation Notes
- Confirm the engine model, two-stroke configuration, horsepower, and serial number before beginning work.
- Disconnect the battery according to the engine manufacturer’s service procedure and allow the engine to cool completely.
- Remove the thermostat-housing covers using the appropriate service-manual procedure.
- Note the orientation and position of each original thermostat before removal.
- Remove the old thermostats and gaskets, then clean the mating surfaces without damaging the housing.
- Install the two replacement thermostats and two new gaskets in the correct orientation.
- Reinstall the housing covers and tighten the fasteners to the manufacturer’s specified torque.
- Run the engine in accordance with the manufacturer’s testing procedure and check for leaks, proper water flow, and stable operating temperature.
- If the engine model or serial number does not match the listed conditions, consult the appropriate service manual or a qualified marine technician before installation.
Troubleshooting & FAQ
How do I confirm this thermostat kit fits my engine?
Verify that your engine is a specified Mercury Marine V6 two-stroke outboard and that its serial number is A904646 or newer for 135–150 HP, C100861 or newer for 175 HP, or 6435503 or newer for 200 HP. The OEM reference is 75692Q2. This kit is not listed for DFI Optimax motors.
What is the thermostat temperature rating?
The thermostats are rated at 143°F (62°C).
How many thermostats and gaskets are included?
The kit includes two thermostats and two gaskets, matching the listed V6 application.
What are common signs of a thermostat problem?
Possible symptoms include overheating, running below the expected operating temperature, inconsistent temperature readings, or abnormal temperature fluctuations. Diagnose the complete cooling system before replacing thermostats.
Is this an OEM Mercury part?
No. This is an aftermarket replacement kit that references Mercury OEM part number 75692Q2. Confirm dimensions, housing configuration, and engine serial number before installation.
Can this kit be used on a DFI Optimax engine?
No. The listed application does not include DFI Optimax motors. Use the thermostat specified for the exact DFI engine model and serial number.
When should thermostats be replaced?
Inspect the thermostats during scheduled cooling-system service and replace them when they fail testing, become corroded or restricted, or show signs of damage. Follow the engine manufacturer’s maintenance schedule and service procedures.
What are the shipping and return terms?
Shipping availability, delivery estimates, warranty coverage, and return eligibility are determined by the applicable order and store policies. Review the terms shown at checkout or contact support before ordering if you need confirmation.
Safety & Important Information
- Verify the complete engine model, horsepower, stroke type, and serial number before purchase.
- Do not rely on a general V6 description alone; the serial-number conditions must also match.
- This is an aftermarket replacement kit, not an original equipment manufacturer part.
- Use the applicable factory service manual for torque values, thermostat orientation, and cooling-system testing.
- Professional marine-service installation is recommended when the engine model or service procedure is uncertain.
About Sea Sierra
- Marine Replacement Parts — We provide aftermarket components for common marine service and repair applications.
- Fitment-Focused Listings — Product information is organized around engine model, horsepower, stroke, and serial-number conditions where available.
- Support Before Purchase — If your engine information does not match the listed application, contact support before ordering.
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