Sierra 18-7061 Needle and Seat Assembly,.065 Bore, Replaces Mercury Marine 1395-8318

The Sierra 18-7061 Needle and Seat Assembly is a carburetor rebuild component built to restore proper fuel metering in marine and personal watercraft carburetors. This assembly uses a.065 bore needle and seat, the precision-fit pairing that controls fuel flow into the carburetor bowl and is a common wear point that causes flooding, rough idle, or hard starting when it wears out or sticks. It is constructed from marine-grade material for durability in the fuel and moisture environment typical of outboard and personal watercraft carburetors.

This needle and seat is used as a rebuild component within Sierra carburetor kits WMK-2, WMK-3, WMK-4, WMK-5, WMK-7, and WMK-8, alongside companion part 18-7021, making it a key replacement item when servicing carburetors covered by those kits. It is intended for personal watercraft applications and is built to match the fit and function of the original Mercury Marine needle and seat it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7061
• Bore Size:.065 inch
• Included Components: Needle & Seat
• Unit Count: 1
• Vehicle Service Type: Personal Watercraft
• Exterior Finish: Machined
• Weight: 0.01 pounds
• UPC: 030999320957
• OEM Cross Reference: Mercury Marine 1395-8318

Fitment

• Used in Sierra carburetor rebuild kits WMK-2, WMK-3, WMK-4, WMK-5, WMK-7, and WMK-8 (paired with companion part 18-7021)
• Personal watercraft applications

Replaces (OEM)

• Mercury Marine 1395-8318

Frequently Asked Questions

What does the Sierra 18-7061 needle and seat assembly replace? It is a direct cross reference to Mercury Marine part number 1395-8318, so it fits applications that originally used that Mercury Marine needle and seat.

What bore size is the 18-7061 needle and seat? This assembly uses a.065 inch bore, the size that controls fuel flow into the carburetor bowl.

What carburetor kits use part 18-7061? The 18-7061 needle and seat is used as a rebuild component in Sierra carburetor kits WMK-2, WMK-3, WMK-4, WMK-5, WMK-7, and WMK-8, alongside companion part 18-7021.

Is this a genuine Sierra part or aftermarket? The 18-7061 is a Sierra International part, manufactured as a direct replacement equivalent to the Mercury Marine 1395-8318 original.

What is included with the 18-7061? The package includes one needle and seat assembly, matching the unit count and components of the original part it replaces.

How much does the 18-7061 needle and seat weigh? It weighs 0.01 pounds, consistent with a small precision carburetor component.

What is the needle and seat made of? The 18-7061 assembly is constructed with marine-grade material for durability in fuel and moisture exposure typical of carburetor environments.

What vehicle types is the 18-7061 intended for? This needle and seat assembly is designated for personal watercraft applications.

How do I know if I need a new needle and seat? Symptoms like carburetor flooding, rough idle, or hard starting often point to a worn or stuck needle and seat, which the 18-7061 assembly is designed to correct when replaced.

What finish does the 18-7061 have? The assembly has a machined exterior finish.

Does the 18-7061 come with a warranty? Yes, the Sierra 18-7061 needle and seat is covered under Sierra's standard limited warranty.