SKU: 9639862713

Thermostat Kit – Fits Mercury/Mariner 75-150 HP 4-Stroke EFI Outboards

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Description

Thermostat Kit – Fits Mercury/Mariner 75-150 HP 4-Stroke EFI OutboardsThermostat Kit Fits Mercury Mariner 75 150 HP 4 Stroke EFI Outboards (Replaces 892864T06, 892864A06) This thermostat kit is a direct fit replacement for Mercury Mariner 75 150 HP 4 Stroke EFI outboards (2001 2014). It is designed for models with serial numbers 1B366823 2B094995 (75 115 HP) and 1B905505 & Up (150 HP). This assembly replaces Mercury part numbers 892864T06, 8M0090819, and 892864A06, as well as Sierra part number 18 3635 K. It provides a

Thermostat Kit – Fits Mercury/Mariner 75-150 HP 4-Stroke EFI Outboards (Replaces 892864T06, 892864A06)

This thermostat kit is a direct-fit replacement for Mercury/Mariner 75-150 HP 4-Stroke EFI outboards (2001-2014). It is designed for models with serial numbers 1B366823-2B094995 (75-115 HP) and 1B905505 & Up (150 HP).

This assembly replaces Mercury part numbers 892864T06, 8M0090819, and 892864A06, as well as Sierra part number 18-3635-K. It provides a reliable solution for maintaining optimal engine operating temperature.

  • Includes the complete assembly with housing, thermostat, O-ring, and clamp.
  • Engineered for a direct-fit OEM replacement installation.
  • Rated for a 48.8°C/50°C (120°F) operating temperature.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number Superseded By
Mercury 892864T06 8M0090819
Mercury 892864A06
JLM Marine AM892864T06
Sierra 18-3635-K

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury EFI 75 4-Stroke 2001-2009 892864T06 Serial range: 1B366823-2B094995
Mercury EFI 80 4-Stroke 2001-2009 892864T06 Serial range: 0P459572-2B094995, 1B366823-2B094995
Mercury EFI 90 4-Stroke 2001-2009 892864T06 Serial range: 1B366823-2B094995
Mercury EFI 100 4-Stroke 2001-2009 892864T06 Serial range: 0P459572-2B094995, 1B366823-2B094995
Mercury EFI 115 4-Stroke 2001-2009 892864T06 Serial range: 1B366823-2B094995
Mercury EFI 150 4-Stroke 2001-2014 892864T06 Serial range: 1B905505 & Up

Technical Specifications

Specification Value
Product Type Thermostat Kit with Housing Assembly
Installation Direct-fit OEM replacement
Fuel Type Gasoline
Housing Material Marine-grade metal alloy
Dimensions Approximately 100 mm × 90 mm × 150 mm [verify orientation]
Operating Temperature 48.8°C/50°C (120°F) rated temperature
Warranty Varies by manufacturer (typically 1 year)
Other Technical Attributes Complete assembly with housing, thermostat, O-ring and clamp

Package Contents

  • 1 x Thermostat Assembly with Housing (892864T06/8M0090819)
  • 1 x O-ring Seal (8M005958)
  • 1 x Clamp (888988008)

Installation Guide

  1. Safety First: Ensure the engine is off and cool. Disconnect the battery cables.
  2. Drain Coolant: Place a container under the engine and drain the cooling system to a level below the thermostat housing.
  3. Locate Housing: Identify the thermostat housing on the engine block.
  4. Remove Old Assembly: Loosen the clamp and detach the hose. Remove the bolts securing the housing and carefully lift it away.
  5. Clean Surface: Thoroughly clean the mating surface on the engine block, removing any old gasket or sealant residue.
  6. Install New Thermostat: Place the new thermostat into the housing, ensuring it is correctly oriented. Install the new O-ring seal.
  7. Reassemble: Mount the new housing assembly onto the engine block and tighten the bolts to the manufacturer's specified torque.
  8. Reconnect Hose: Reattach the coolant hose and secure it with the new clamp.
  9. Refill & Check: Refill the cooling system with the appropriate coolant. Start the engine and carefully check for any leaks around the housing.
  10. Final Test: Allow the engine to reach operating temperature, monitoring the temperature gauge to ensure it is stable and within the correct range.

Troubleshooting & FAQ

How do I confirm this fits my engine?

Check the compatible models table and verify your engine's serial number falls within the specified range for your model, year, and horsepower. Cross-referencing the part number (892864T06) with your service manual is also recommended.

What temperature does this thermostat operate at?

This thermostat is rated for 48.8°C/50°C (120°F) to ensure your engine maintains its optimal operating temperature for performance and efficiency.

What are common signs of a failing thermostat?

Signs of a faulty thermostat include engine overheating, the engine not reaching normal operating temperature (running too cool), erratic temperature gauge readings, poor engine performance, or increased fuel consumption.

Is this a complete kit for installation?

Yes, this is a complete kit that includes the thermostat, the housing assembly, the required O-ring seal, and the clamp, providing all the necessary components for a standard replacement.

OEM vs. Aftermarket?

This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?

We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?

This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 9639862713

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4.2 ★★★★★
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Trendy Tales
Lake Worth, US
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
K
Katrina Rhodes
Omaha, US
★★★★★ 5
Nice divider, serves it's purpose well!
Size: 3 Panel 12FT W
This room divider worked out very well for what I needed. I wanted a simple way to create a little more privacy and separation in a larger room without doing anything permanent, and this divider was an easy solution. The panels provide good coverage, and the black color gives it a clean, modern appearance that blends in nicely with different décor styles. Assembly was fairly straightforward, and once set up, the wider feet helped keep the divider stable on the floor. I was especially happy with how flexible the panels are to arrange. You can keep it mostly straight, angle it around furniture, or create a more enclosed private space depending on the layout you need. The material allows light to filter through slightly while still offering a noticeable sense of privacy. I’ve used it for separating a workspace area, but it would also work well in bedrooms, apartments, dorms, studios, or shared living spaces. Another plus is that it can be folded and moved without too much effort when you want to change the setup. Overall, this divider delivers a good balance of functionality, portability, and appearance. It’s a practical option for anyone needing temporary room separation without installing permanent walls or curtains.
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Reviewed in the United States on May 26, 2026
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Jamie K.
Phoenix, US
★★★★★ 5
Perfect for Adding Privacy to a Piano Studio
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
I Ordered the 2 Panel version which is way too big for my needs... that's on me. So keep in mind that the picture shows a fabric made for two panels only being used on one and hence it is not pulled tight; it would pull tight and not be so wrinkly if it was set up properly as two panels. The metal pools that make up the panels seem to be well made, stable, and of good quality. They were very easy to put together and they stand up tall with plenty of height. The appearance of it with the fabric on it isn't as elegant as it could be, but it still looks good enough. The material is plenty solid, not allowing light through it, and thereby making a solid barrier. I am using it to block the view out the studio door when a student is sitting at the piano to avoid distractions from the hallway. It will allow a student to enter the studio with our distracting the student who is at the piano.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
J
Just Me
Louisville, US
★★★★★ 5
Room Divider That Gives Instant “This Is a Separate Space Now” Energy
Size: 3 Panel 12FT W
The Siebwin 3 Panel Folding Privacy Screen is surprisingly effective at changing the feel of a room without requiring construction, commitment, or somebody yelling about load bearing walls. The 12 foot width gives a substantial amount of coverage, making it useful for creating privacy, dividing open areas, blocking visual clutter, or setting up temporary sections within larger rooms. This saved us a ton of time and money in our new studio and enabled us to create a kitchen and office in one room. The wider feet make a huge difference because flimsy room dividers that collapse every time someone exhales too aggressively are deeply annoying. This one feels more stable and grounded once positioned. The folding design makes it easy to move around or adjust depending on the space, and it folds down relatively compactly when not in use. It is basically the introvert curtain wall of dreams. The material has a clean, neutral look that blends well into different room styles without screaming “temporary office cubicle panic.” It works well for apartments, studios, shared spaces, dressing areas, or simply hiding the mountain of chaos you swear you are going to organize tomorrow. Practical, portable, and refreshingly easy to use without turning setup into a three hour emotional event.
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Reviewed in the United States on May 16, 2026
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Skeetre
West Palm Beach, US
★★★★★ 4
It's 2 panels holding 1 big privacy screen. Can't use as 2 separate 4' panels, but works great.
Size: 2 Panel 8FT W
This 2 panel privacy screen works well. Assembly was very straight forward, with easily labeled tubes. My son and I had it together in about 10 minutes, which was probably 3 minutes of me telling him to quit playing around and hand me the parts. It feels very sturdy, not likely to fall over or anything. The material fits well, with the Velcro being very strong. Measurements are all very accurate, with all pieces attaching properly. We have a similar privacy screen at work that we have to try and stretch out because the top and bottom Velcro doesn't fit quite right... this model does not have any issues though. The material is thin and light weight, but solid black so that you can't see anything through or behind it. I definitely think it's a great deal for the money. What I think would have given it 5 stars though, is if you had 2 totally separate 4' panels instead of 2 panels with one big screen. It really wouldn't cost any extra to make it so that the screen was in 2 pieces and you could use it as 2 separate panels instead of having to use it as one big panel. It says 2 panel folding privacy screens, but it's really one big one that folds in the middle.
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Reviewed in the United States on May 25, 2026

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