Part Number: RM0290
PCM RM0290 Thermostat Gasket
Ensure a reliable seal and proper cooling system performance with the PCM RM0290 Thermostat Gasket. Designed as a genuine OEM replacement, this gasket creates a secure seal between the thermostat housing and engine components to help prevent coolant leaks and maintain stable operating temperatures.
Whenever a thermostat is replaced or serviced, installing a new gasket is essential for maintaining proper cooling system pressure and sealing performance. Reusing old gaskets can lead to coolant seepage, uneven sealing surfaces, or air intrusion that may affect engine temperature regulation. The RM0290 gasket is engineered for precise fitment and dependable sealing reliability in demanding marine environments.
Manufactured to PCM factory specifications, this marine-grade gasket is built to withstand repeated heat cycles, coolant exposure, and engine vibration. Designed as a direct replacement, it simplifies thermostat service and helps restore factory-level cooling system integrity.
Common Engine Fitments
The PCM RM0290 thermostat gasket is commonly used on PCM marine engines, including:
- PCM Excalibur 5.7L
- PCM Ex343
- PCM GT40 Ford 351
- PCM ZR409
- PCM ZR450
- PCM 5.0L and 5.7L GM-based engine platforms
These engines are frequently found in:
- Correct Craft Ski Nautique and Super Air Nautique
- Nautique G-Series wake boats
- Malibu Response and Wakesetter models with PCM power
- Supra towboats equipped with PCM engines
- Moomba wake boats with PCM applications
- MasterCraft boats with compatible PCM engine packages
The RM0290 gasket is commonly used during thermostat replacement and cooling system maintenance where maintaining proper coolant sealing is critical for dependable engine operation.
Fitment can vary depending on engine serial number and thermostat housing design, so confirming compatibility with part number RM0290 before ordering is recommended.
Key Features
- Genuine PCM OEM thermostat gasket
- Provides a secure seal for thermostat housing assemblies
- Helps prevent coolant leaks and cooling system pressure loss
- Designed for PCM marine engine applications
- Marine-grade material built for durability
- Direct-fit replacement for easy installation
Why Replace a Thermostat Gasket?
Over time, thermostat gaskets can compress, crack, or deteriorate from heat and coolant exposure. Replacing the gasket during thermostat service helps maintain proper cooling system operation and reduces the risk of leaks that could lead to overheating issues.
If you’re servicing a PCM-powered ski boat, wake boat, or surf boat, the RM0290 thermostat gasket delivers the OEM-quality fit and dependable sealing performance your cooling system depends on.