SIERRA 18-3109 Cooling Water Hose Flange

Compatible Engines

The SIERRA 18-3109 Cooling Water Hose Flange is a critical component of the cooling system, designed to ensure tightness and reliable operation of the propulsion unit. This is an original replacement part that directly addresses the needs of MERCRUISER and MERCURY users (MC/MR/Alpha One series). The product features precise manufacturing, guaranteeing a perfect fit to the nipples and eliminating the risk of coolant leaks during operation.

Due to the specifics of the marine parts market, compatibility must be verified by the manufacturer's catalog number (18-3109) or the original OE number. We do not provide a list of specific engine models here to avoid selection errors. If you have doubts about the fitment in your unit, we recommend contacting store support, who will help you confirm part compatibility based on your engine data.

Installation and Operation

Replacing the flange is a task that requires caution and attention to detail. Below you will find the key features of this product:

• Original SIERRA quality – durable materials resistant to corrosion and the effects of fresh and salt water.
• Secure sealing – prevents coolant loss, protecting the engine from overheating.
• Precise dimensions – the product weighs 0.01 kg and has dimensions of 7x2x2.5 cm, ensuring easy installation without the need for modifications.
• Easy identification – EAN 030999315465 facilitates quick finding of the correct part in the warehouse.

During installation, we recommend using new seals and checking the condition of the connections. Regular replacement of worn cooling system elements is an investment in the longevity of your engine.