Sierra Thermostat Kit Mercruiser 18-3668

⚠️ Important Pickup Information

While our retail store carries a wide selection of products shown on this website, it is not possible to stock all 80,000+ products in-store.

Please place your order online or call us before driving to the store to confirm inventory availability.

If the item is not available in-store, we can usually transfer it from our warehouse within 3–5 business days, and we'll notify you as soon as it is ready for pickup or delivery .