MerCruiser Thermostat Kit 142°F 8M0089715 RM75-02367 V6 V8 4.3 5.0 5.7L Marine
RM75-02367
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MerCruiser Thermostat Kit (142°F)
Premium Cooling System Replacement for V6 & V8 Engines
Maintaining the correct operating temperature is critical for marine engine longevity and fuel efficiency. This premium RecMar Thermostat Kit is specifically engineered for MerCruiser V6 and V8 GM-based engines utilizing standard (raw water) cooling systems. The 142°F (60°C) rating is specifically chosen for saltwater and open-water environments to prevent salt crystallization and scale buildup within the cooling passages.
Key Features
- ✔ Complete Kit: Includes thermostat and required gaskets/seals
- ✔ Saltwater Ready: 142°F prevents mineral deposits
- ✔ Precision Calibrated: Ensures rapid warm-up and stable temp
- ✔ Corrosion Resistant: Stainless steel internal spring
Technical Specs
| Opening Temp: | 142°F (60°C) |
| Engine Type: | GM V6 & V8 (MCM/MIE) |
| Cooling Type: | Standard / Raw Water |
| Material: | Stainless Steel / Brass |
| SKU: | RM75-02367 |
Compatibility / Fitment Guide
| Engine Make | Model/Application | Year Range |
|---|---|---|
| MerCruiser V6 | 4.3L, 4.3LX, 4.3L EFI (GM 262 CID) | 1983 - 2016 |
| MerCruiser V8 | 5.0L, 5.7L, 350 Mag, 6.2L (Small Block GM) | 1983 - 2016 |
| MerCruiser V8 | 7.4L, 454 Mag, 8.2L, 502 Mag (Big Block GM) | 1983 - 2016 |
| Note: Fits engines with standard/raw water cooling. Not for high-performance or closed cooling (antifreeze) systems requiring higher temp thermostats. | ||
OEM Cross Reference
| Mercury / Quicksilver | 8M0089715, 807252Q4, 8072521, 807252T1, 808252T4 |
| Sierra Marine | 18-3668 (Kit), 18-3551 (Thermostat) |
| RecMar | RM75-02367 |
| GLM / Mallory | GLM 13030 / Mallory 9-43021 |
Questions & Answers
Is this a genuine original part?
This is a premium quality aftermarket replacement part from RecMar, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
Why 142 degrees instead of 160 degrees?
142°F is standard for raw water cooled engines used in saltwater. Higher temperature thermostats (160°F+) are typically reserved for freshwater closed cooling systems (Heat Exchangers) using antifreeze.
Does this kit include everything needed for installation?
Yes, the kit includes the 142°F thermostat, the housing gasket, and the required sealing O-ring for a standard MerCruiser V6/V8 thermostat housing.
Note: Please verify your original part number against the references above before purchasing. Distributed by 4boats.co.uk.
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