Sierra 18-2608 Water Pump Gasket for Honda BF8A 8 HP Outboard Motors

The Sierra 18-2608 is a water pump gasket engineered for Honda BF8A 8 HP outboard motors. It is the gasket component of the water pump impeller service kit, designed to seal the water pump housing against the powerhead so the impeller can draw and circulate cooling water without leaks. Replacing this gasket is a standard part of a water pump service, typically performed alongside the impeller itself to restore proper cooling system sealing and prevent water intrusion or loss of pump pressure.

This gasket is sold as an individual component, separate from the impeller and the housing, so it can be used on its own for a gasket-only refresh or as part of a complete water pump rebuild. It is manufactured to fit the specified Honda BF8A engine coverage listed below, using the Honda engine code referenced for this application.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2608
• Product Type: Water Pump Gasket
• UPC: 808282227784
• Weight: 0.01 pounds
• Engine Make: Honda
• Engine Model: BF8A
• Horsepower: 8 HP
• Honda Engine Code: 6315386

Fitment

• Honda BF8A, 8 HP, model years 1998-00
• Honda BF8A, 8 HP, model years 2003-06
• Honda BF8A, 8 HP, K0

Frequently Asked Questions

What is the Sierra 18-2608 gasket used for? The Sierra 18-2608 is a water pump gasket for Honda BF8A 8 HP outboard motors, used to seal the water pump housing during a water pump or impeller service.

Does the 18-2608 gasket fit Honda BF8A 8 HP outboards? Yes, the 18-2608 gasket is fitted to Honda BF8A 8 HP outboard motors covering model years 1998-00, 2003-06, and K0.

Does this gasket come with the impeller or housing? No, Sierra 18-2608 is the gasket only; the impeller and housing for the Honda BF8A water pump are separate part numbers.

How much does the 18-2608 gasket weigh? The Sierra 18-2608 gasket weighs 0.01 pounds.

What Honda engine code corresponds to this gasket's fitment? The Honda engine code associated with the BF8A 8 HP fitment for the 18-2608 gasket is 6315386.

Is the 18-2608 an OEM Honda part? The 18-2608 is a Sierra-branded gasket manufactured to fit Honda BF8A 8 HP outboard motors; it is not an OEM Honda-branded part.

Should the gasket be replaced when servicing the water pump impeller? Yes, replacing the gasket along with the impeller during a Honda BF8A water pump service helps ensure a proper seal and prevent cooling system leaks.

Does the 18-2608 gasket fit Honda BF8A engines with K2 or K3 codes? The 18-2608 fitment listing for Honda BF8A includes K0; K2 and K3 designations are not listed for this specific gasket.

What is included when ordering the 18-2608? Ordering the Sierra 18-2608 includes the single water pump gasket only, without the impeller or housing.

Is the 18-2608 gasket specific to the BF8A model only? Yes, based on its listed fitment, the Sierra 18-2608 gasket is specified for the Honda BF8A 8 HP outboard motor.