Thermostat Repair Kit for Mercury/Mariner 2-Stroke 6–25 HP – Replaces 14586A3, 75692A9, 75692A10 and 75692A11

Product Details

This thermostat repair kit is intended for selected Mercury and Mariner 2-stroke outboard engines rated from 6 to 25 HP. It is designed as a service replacement for the thermostat and related sealing components used in the listed applications. Always compare the original parts and verify the engine model, year and serial number before ordering.

The kit is listed as a replacement reference for Mercury part numbers 14586A3, 75692A9, 75692A10 and 75692A11. The aftermarket references listed below are provided for cross-reference and should be confirmed against the original component before installation.

• Product type: Thermostat repair service kit
• Installation method: Direct replacement
• Nominal thermostat temperature: 120°F (50°C)
• Application: Selected Mercury and Mariner 2-stroke outboards from 6–25 HP
• Package contents: Thermostat, seals and gaskets as listed below

Part Number Cross-Reference

Use these references to help compare the replacement kit with the part removed from your engine. Cross-reference numbers do not replace model, year and serial-number verification.

Engine and Model Compatibility

The following applications are associated with the listed thermostat reference. Fitment can vary by production location and serial range, so verify the complete engine identification before purchase.

Technical Specifications

Product type

Thermostat repair service kit

Installation

Direct replacement

Nominal temperature rating

120°F (50°C)

Housing and component materials

Metal, plastic and stainless steel components may be included, depending on the kit component

Approximate weight

0.06 kg (0.13 lb)

Aftermarket status

Aftermarket replacement; not a genuine Mercury OEM component

What's in the Box

• 1 × Thermostat, reference 14586
• 1 × Thermostat seal or rubber ring, reference 62386001 / 27-62386
• 1 × Thermostat cover gasket, reference 14318 / 27-14318-3
• 1 × Thermostat gasket, reference 19205 / 27-19205-1

Installation Notes

1. Allow the outboard engine to cool completely before starting work. Follow the engine manufacturer's safety procedures and disconnect the battery when appropriate.
2. Locate the thermostat cover and place a suitable drain pan beneath the area to catch water or residual fluid.
3. Remove the fasteners securing the thermostat cover. If the cover is stuck, loosen it carefully without damaging the mating surfaces.
4. Note the orientation of the original thermostat before removing it.
5. Clean the housing and cover mating surfaces thoroughly, removing old gasket material without scratching the sealing surfaces.
6. Install the replacement thermostat in the same orientation as the original, then position the new gasket and seal components.
7. Reinstall the cover and tighten the fasteners to the engine manufacturer's specified torque. Do not overtighten.
8. Run the engine according to the manufacturer's testing procedure and check for proper water flow, leaks and stable operating temperature.

Installation should be performed by a qualified technician if the correct procedure, torque specifications or engine-specific service information is unavailable.

Troubleshooting and FAQ

Safety and Important Information

• Verify the engine model, year, horsepower, stroke and serial range before purchase.
• Compare the replacement parts with the original thermostat, seals and gaskets before installation.
• Never work on a hot engine. Follow the manufacturer's service and safety instructions.
• This is an aftermarket replacement kit, not a genuine Mercury OEM component.
• Do not operate the outboard if it overheats, leaks or shows inadequate cooling-water flow.

About Sea Sierra

• Marine Replacement Parts — Parts and kits selected for common marine service applications.
• Fitment-Focused Listings — Reference numbers and application information are provided to help with pre-purchase comparison.
• Support Before Installation — Contact support if the product differs from the original part or if application details are uncertain.