Sierra 18-3676 Thermostat Kit for OMC Sterndrive/Cobra 5.0L I/O Cooling Systems (1994-97)

The Sierra 18-3676 Thermostat Kit is a replacement cooling system thermostat kit built for OMC Sterndrive/Cobra 5.0 L I/O engines from the 1994-97 model years. It is designed to restore correct engine operating temperature control on the raw water and closed cooling circuits found on these sterndrive applications. The kit is also intended for use as a replacement thermostat kit on other OMC and Volvo engine and stern drive cooling systems.

Sierra builds this kit to meet or exceed the original equipment part it replaces, so it installs and functions the same way as the factory thermostat it is servicing. The kit includes a single diameter hose as part of the assembly, keeping the cooling circuit connection consistent with the OEM design. Sierra supplies OEM engine manufacturers and boat builders with cooling system parts, and the 18-3676 kit is manufactured to that same quality standard for the aftermarket and repair channel.

This thermostat kit is a straightforward maintenance-interval or diagnostic-repair item for boat owners and marine technicians working on OMC Sterndrive/Cobra 5.0 L I/O cooling systems, restoring proper thermostat function so the engine reaches and holds its correct operating temperature.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3676
• Product Type: Thermostat Kit
• Hose Type: Single diameter hose
• Application: I/O - OMC Sterndrive/Cobra Cooling System
• Engine Displacement: 5.0 L
• Model Years: 1994-97
• Specific Uses: Replacement thermostat kit for OMC and Volvo engines and stern drives
• Weight: 0.15 pounds
• UPC: 808282148232
• GTIN: 00808282148232
• Warranty: Limited warranty

Fitment

• I/O - OMC Sterndrive/Cobra, 5.0 L, 1994-97

Frequently Asked Questions

What engines does the Sierra 18-3676 thermostat kit fit? The Sierra 18-3676 thermostat kit is built for I/O OMC Sterndrive/Cobra 5.0 L engines from the 1994-97 model years, and is also intended as a replacement thermostat kit for other OMC and Volvo engine and stern drive cooling systems.

Does the 18-3676 kit include a hose? Yes, the Sierra 18-3676 thermostat kit includes a single diameter hose as part of the assembly, matching the connection design used on the cooling circuit it services.

How much does the Sierra 18-3676 thermostat kit weigh? The Sierra 18-3676 thermostat kit weighs 0.15 pounds.

Is the Sierra 18-3676 an OEM-equivalent part? Sierra manufactures the 18-3676 thermostat kit to meet or exceed the original equipment part it replaces, so it is built as a direct OEM-equivalent replacement rather than a generic substitute.

What is the UPC for the Sierra 18-3676 thermostat kit? The Sierra 18-3676 thermostat kit carries UPC 808282148232 and GTIN 00808282148232.

Can this thermostat kit be used on Volvo Penta engines? The Sierra 18-3676 is intended for use as a replacement thermostat kit for OMC and Volvo engines and stern drives, in addition to its OMC Sterndrive/Cobra 5.0 L I/O application.

What system does the 18-3676 thermostat kit service? This kit services the cooling system on I/O OMC Sterndrive/Cobra applications, restoring proper thermostat regulation of engine operating temperature.

Is a warranty included with the Sierra 18-3676? Yes, the Sierra 18-3676 thermostat kit is backed by a limited warranty from Sierra.

Why replace a marine thermostat kit like the 18-3676? A worn or stuck thermostat can cause an I/O engine to run too cold or overheat, so replacing it with a kit like the Sierra 18-3676 restores correct operating temperature control on OMC Sterndrive/Cobra 5.0 L cooling systems.

Is the Sierra 18-3676 a complete kit or just the thermostat? The Sierra 18-3676 is sold as a thermostat kit, packaged with a single diameter hose rather than the thermostat alone.