Mercury-Mercruiser 8M0231826 Oil Thermostat with Piston
New design oil thermostat and piston. Please see below. This is a genuine Mercury Racing factory OEM part, not aftermarket
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This oil thermostat assembly for Mercury Racing 502 cubic inch-based and QC4 engines includes the oil thermostat and piston under one part number. Previously sold separately, the original oil thermostat and piston are now no longer available (NLA).
Engine Compatibility
This assembly fits the following Mercury Racing engine models:
| Engine Model | Serial Number |
|---|---|
| 500 EFI | All |
| 520 | All |
| 525 EFI | All |
| 540 | All |
| 565 EFI | All |
| 575 SCi | All |
| 600 SCi | All |
| 700 SCi | All |
| All QC4 engines | All |
Important: The new oil thermostat and piston must be used together. Neither component is interchangeable with the original oil thermostat or piston.
Engines Not Compatible
This new assembly will not fit the following engines:
- 500 Carb
- 525 SC
- 600 SC
- D-Tronic Diesel 2.8L and 4.2L engines
This oil thermostat assembly for Mercury Racing 502 cubic inch-based and QC4 engines includes the oil thermostat and piston under one part number. Previously sold separately, the original oil thermostat and piston are now no longer available (NLA).
Engine Compatibility
This assembly fits the following Mercury Racing engine models:
| Engine Model | Serial Number |
|---|---|
| 500 EFI | All |
| 520 | All |
| 525 EFI | All |
| 540 | All |
| 565 EFI | All |
| 575 SCi | All |
| 600 SCi | All |
| 700 SCi | All |
| All QC4 engines | All |
Important: The new oil thermostat and piston must be used together. Neither component is interchangeable with the original oil thermostat or piston.
Engines Not Compatible
This new assembly will not fit the following engines:
- 500 Carb
- 525 SC
- 600 SC
- D-Tronic Diesel 2.8L and 4.2L engines