# 238M0214947 Mercury MerCruiser 8M0214947 Thermostat Sleeve | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Thermostat Housing Sleeve - Part Number: 23-8M0214947

  

Genuine Quicksilver thermostat housing sleeve used in MerCruiser one-piece thermostat housing assemblies. This sleeve is the current Mercury replacement for earlier 23-806922 / 806922 sleeve references and is used on selected MerCruiser 3.0L, 4.3L, 5.0L, 5.7L, 6.2L, 7.4L and 8.2L petrol engines where the thermostat housing diagram specifies the sleeve retainer.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM thermostat housing sleeve

• Correct current Mercury part number 23-8M0214947

• Supersedes 23-806922 and related earlier sleeve references

• Used with MerCruiser one-piece thermostat housing assemblies

• Supports correct thermostat seating and coolant / raw-water flow control

• Common service item during thermostat housing rebuilds

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 23-8M0214947 → Supersedes 23-806922

• 23-806922 earlier OEM thermostat housing sleeve reference

• 806922 earlier short-form reference

• 805532 related earlier sleeve / retainer reference

• 17495 / 174951 related earlier thermostat sleeve references

  

OEM / Related Numbers:

  

• 23-8M0214947

• 8M0214947

• 238M0214947

• 23-806922

• 806922

• 805532

• 17495

• 174951

• Thermostat housing sleeve

• Thermostat sleeve retainer

• MerCruiser one-piece thermostat housing sleeve

• 8M0109441 related 160°F thermostat

• 807252T2 related thermostat reference

• 27-530451 related thermostat gasket family reference

• 27-806871 related thermostat housing gasket family reference

  

Aftermarket / Verified Equivalents:

  

• Recmar: REC23-806922

• Recmar / RM: RM23-806922 style thermostat sleeve equivalent

• Aftermarket plastic thermostat housing sleeve equivalents for 23-806922 / 23-8M0214947 applications

• Use exact sleeve profile match because the sleeve controls thermostat location inside the one-piece housing

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser one-piece thermostat housing assemblies

• MerCruiser GM inline, V6 and V8 petrol cooling systems

• Thermostat housing service where sleeve 23-806922 / 23-8M0214947 is specified

  

Typically suits:

  

• Engine models:

• MerCruiser 3.0L GM 181 inline 4-cylinder standard cooling applications where one-piece thermostat housing uses sleeve 23-8M0214947

• MerCruiser 3.0LX GM 181 inline 4-cylinder standard cooling applications where specified

• MerCruiser 3.0 MPI EC applications where the thermostat housing diagram specifies 23-8M0214947

• MerCruiser 4.3L GM V6 carburetted standard cooling applications where specified

• MerCruiser 4.3LX GM V6 standard cooling applications where specified

• MerCruiser 4.3L MPI Alpha / Bravo applications using the one-piece thermostat housing sleeve

• MerCruiser 5.0L GM 305 V8 carburetted / EFI / MPI applications where specified

• MerCruiser 5.0L MPI Alpha / Bravo applications using sleeve 23-8M0214947

• MerCruiser 5.7L GM 350 V8 carburetted / EFI / MPI applications where specified

• MerCruiser 350 MAG MPI Alpha / Bravo applications using the one-piece thermostat housing sleeve

• MerCruiser 350 MAG MPI Horizon applications where specified

• MerCruiser MX 6.2L MPI Bravo applications where specified

• MerCruiser MX 6.2L MPI Horizon Bravo applications where specified

• MerCruiser 7.4L / 454 MAG / 454 MAG MPI applications using thermostat sleeve 23-806922 / 23-8M0214947

• MerCruiser 8.1L / 496 and 8.2L big-block applications where the thermostat housing diagram specifies this sleeve

  

• Common Serial Families:

• MerCruiser 3.0L / 3.0LX late Alpha applications: 0F603000 and up where sleeve is shown

• MerCruiser 4.3L V6 Gen+ / MPI applications: 0F803000 and up where specified

• MerCruiser 5.0L / 5.7L small-block Gen+ applications: 0F601000 and up where specified

• MerCruiser 350 MAG / 5.7L MPI service families: 0L010041 and up where the one-piece housing diagram lists this sleeve

• MerCruiser 6.2L MPI service families: 0M300000 and up where specified

  

• Engine Type: MerCruiser petrol inline 4, V6, small-block V8 and big-block V8 where specified

• System Type: Thermostat housing sleeve / cooling-system retainer

  

🔌 Function

  

The thermostat sleeve locates and retains the thermostat inside the housing so the thermostat can open and close against the correct seat. A damaged or missing sleeve can cause poor temperature control, leakage inside the housing or incorrect thermostat positioning.

  

Common signs of failure:

  

• Thermostat not seating correctly

• Engine running too cool or overheating

• Sleeve cracked, distorted or missing

• Thermostat housing rebuilt and sleeve damaged during removal

• Cooling flow bypassing the thermostat incorrectly

• Corrosion or debris around thermostat housing seat

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 5.35 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5.35 AUD | In stock |

## Images

- 238M0214947 Mercury MerCruiser 8M0214947 Thermostat Sleeve | Genuine Quicksilver OEM Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/238m0214947-mercury-mercruiser-8m0214947-thermostat-sleeve-genuine-quicksilver-oem-part)
> Updated: 2026-07-18