Sierra 18-3647 Thermostat Kit 71.1°C (160°F) | 4Boats
18-3647 MA104
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Regular price£41.99
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Tax included.
Sierra 18-3647 thermostat kit provides a direct replacement for MerCruiser inboard and sterndrive engines, ensuring reliable temperature control and preventing overheating.
- Thermostat rating: 71.1°C (160°F) — 18-3649 element (replaces Mercury 807252-2)
- Kit contents: 18-3649 thermostat, 18-2844 gasket/O‑ring set and all necessary seals for a long‑lasting installation
- Marine‑grade construction for durability in harsh marine environments
- OEM cross‑references: Mercury 807252Q5, 807252T5; Sierra 18-3647D; Mallory 9-43157
- Compatibility: Suitable for a range of MerCruiser inboard and sterndrive engines — 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, 8.2L
- Suitable models include: 3.0L TKS L4; 4.3L / 4.3LX / 4.3LH EFI (Alpha, Bravo); 5.0L
- Fitment: Direct replacement design for simple installation without modifications
Perfect for routine maintenance or repair, this thermostat kit restores correct engine cooling and helps protect your MerCruiser powerplant.
For the products under £150 the shipping is £6.99.
Free delivery for the most items over £150.
