Sierra 18-4380 Timing Chain Gasket Set, Replaces 27-68714A6, for Mercruiser 224 CID Engines

The Sierra 18-4380 Timing Chain Gasket Set is a complete gasket kit engineered for Mercruiser 224 CID engines, covering the 165, 170, 180, 190, 470, 485 and 488 HP versions of that engine. It is built for boat owners and marine technicians servicing the timing chain cover and related sealing points during an engine rebuild or gasket replacement job, giving you every gasket needed in one kit rather than sourcing each piece separately.

Beyond the timing chain cover gasket itself, this set includes the sub-component gaskets required to complete the job correctly: a fuel pump mounting gasket and two water pump gaskets, each cross-referenced to their original equipment part numbers so fit and sealing performance match the components they replace. Sierra manufactures this set to meet or exceed the original equipment part it replaces, and every Sierra part is backed by Sierra's standard customer satisfaction warranty.

This kit is sold as Sierra part number 18-4380 and is a direct fit for the Mercruiser 224 CID engine platform listed below. Confirm your engine's CID and horsepower rating against the fitment list before ordering to ensure correct application.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-4380
• Product Type: Timing Chain Gasket Set
• Engine Fitment: Mercruiser 224 CID Engine
• Horsepower Ratings: 165, 170, 180, 190, 470, 485, 488 HP
• Kit Contents: Fuel Pump Mounting Gasket (Sierra 18-0889, O.E. 27-34213) - Qty 1; Water Pump Gasket (Sierra 18-0903, O.E. 27-49110) - Qty 2
• OEM Cross Reference: 27-68714A6, 27-68714A7, 27-68714, 27-72098
• Color: White
• Weight: 0.41 pounds
• UPC: 808282259228

Fitment

• Mercruiser 224 CID Engine - 165, 170, 180, 190, 470, 485 & 488 HP

Replaces (OEM)

• 27-68714A6
• 27-68714A7
• 27-68714
• 27-72098

Frequently Asked Questions

What engine does the Sierra 18-4380 Timing Chain Gasket Set fit? The Sierra 18-4380 Timing Chain Gasket Set fits the Mercruiser 224 CID engine in the 165, 170, 180, 190, 470, 485 and 488 HP variants.

What OEM part numbers does 18-4380 replace? Sierra 18-4380 replaces OEM numbers 27-68714A6, 27-68714A7, 27-68714 and 27-72098.

What is included in this gasket set? The kit contains the timing chain gasket components plus a fuel pump mounting gasket (Sierra 18-0889, O.E. 27-34213, qty 1) and two water pump gaskets (Sierra 18-0903, O.E. 27-49110, qty 2).

How much does the Sierra 18-4380 gasket set weigh? This set weighs 0.41 pounds.

What color is the gasket material? The gaskets in the Sierra 18-4380 set are white.

Is this a genuine Sierra part or an aftermarket copy? Sierra 18-4380 is a genuine Sierra-manufactured part, engineered to meet or exceed the original equipment part it replaces and covered by Sierra's customer satisfaction warranty.

Will 18-4380 work on any Mercruiser engine? No, this set is specific to the Mercruiser 224 CID engine across the 165, 170, 180, 190, 470, 485 and 488 HP ratings; it is not a universal gasket set.

Does this set include the fuel pump gasket separately, or do I need to buy it separately? The fuel pump mounting gasket (Sierra 18-0889, O.E. 27-34213) is included in the Sierra 18-4380 kit, so no separate purchase is needed for that component.

How many water pump gaskets come in the box? Two water pump gaskets (Sierra 18-0903, O.E. 27-49110) are included in the Sierra 18-4380 Timing Chain Gasket Set.

What is the UPC for the Sierra 18-4380 Timing Chain Gasket Set? The UPC for Sierra 18-4380 is 808282259228.