142 Degree Thermostat Kit | Sierra 18-3651
142 Degree Thermostat Kit | Sierra 18-3651
Sierra
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142 Degree Thermostat Kit | Sierra 18-3651
142 degree thermostat kit designed to work with many different models of Mercruiser marine engines.
- Fits Mercruiser model 230 Inboard raw water cooled engines with serial number range 590758 to B522505
- Fits Mercruiser model 225 327 V-8 GM raw water cooled engines from 1967 to 1969 with serial number range 2399198 to 2694014
- Fits Mercruiser model 225 Ford raw water cooled engines with serial number range 3385721 & up
- Fits Mercruiser model 260 GM 350 CID raw water cooled engines from 1978 to 1982 with serial number range 4908850 to 6218461
- Fits Mercruiser model 260 GM 350 CID Inboard raw water cooled engines with serial number range B522506 to B525981
- Fits Mercruiser model 898 198 CID GM raw water cooled engines with serial number range 4762210 to 6218461
- Kit includes 18-3551 142 degree thermostat, 18-2554 cover gasket, 18-2553 cover gasket, 18-2834 cover gasket, and 18-2844cover gasket
- Replaces Mallory 9-43152
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.