Sierra NEW Water Pump Kit w/ Housing Base 18-3319 Replaces: 46-42579A4 NOS 0810

Sierra Complete Water Pump Kit with Housing & Base — Part Number 18-3319
Brand: Sierra | Condition: New Old Stock (NOS)

You are purchasing a new Sierra Complete Water Pump Kit with Housing and Base, part number 18-3319, for Mercury/Mariner outboard engines and MerCruiser sterndrives. This is a genuine Sierra branded part — never installed, never used.

Kit Contents:

• (1) Water Pump Housing — 18-3116
• (1) Water Pump Base — 18-3419
• (1) Impeller — 18-3017
• (1) Impeller Plate — 18-3117
• (1) Water Tube Guide — 18-3109
• (1) Water Pump Gasket — 18-2801
• (1) Water Pump Base Gasket — 18-2826
• (1) Water Pump Gasket — 18-2914
• (1) Water Pump Gasket — 18-2915
• (1) Water Pump Gasket — 18-2919
• (1) Seal Ring — 18-2944
• (2) Drain Screw Gaskets — 18-2945
• (1) O-Ring — 18-7158
• (1) O-Ring — 18-7162
• (1) O-Ring — 18-7173
• (1) O-Ring — 18-7176
• (1) O-Ring — 18-7426

Note: Same as 18-3316 but includes Water Pump Base (18-3419).

Condition Details:

This is a New Old Stock (NOS) part. The water pump kit itself is in new, uninstalled condition. As is common with NOS inventory, the original packaging may show signs of age, including shelf wear, dust, or minor cosmetic blemishes on the bag or box. The part is new and fully functional.

Part Number / Supersede Information:

Primary Part Number: 18-3319
Replaces OEM Mercury / MerCruiser: 46-96148A8, 46-96148A5, 46-78400A2, 46-73804A3, 46-73802A3, 46-69222A3, 46-64141A11, 46-60367A4, 46-60367A1, 46-58618A4, 46-57234A3, 46-48747A3, 46-44292A4, 46-42579A4, 46-37433A1, 46-32437A3, 46-32437A1
Cross-Reference: Mallory 9-48306

Fitment:

• Fits: MerCruiser I, IA/IB/IC, R, MR, Alpha One sterndrives, 1963–1990
• Fits: Mercury / Mariner 65HP through 220HP outboard motors across a broad year range
• Compatible models include: MerCruiser 120/140HP (1967–1982), 165HP (1970–1981), 228HP (1978–1982), 260HP (1978–1982), 470HP (1978–1982), 485HP, 898HP (1978–1982) and many Mercury outboard applications
• Please verify fitment using your engine's model and serial number before ordering

Why Choose Quality Replacement Parts?

Sierra parts are engineered to meet or exceed OEM specifications, providing reliable performance and a precise fit for your Mercury or MerCruiser engine. Every Sierra part is purpose-built for harsh marine environments and backed by Sierra's limited lifetime warranty covering defects in workmanship and materials.

Returns:

We proudly offer hassle-free returns. If you are not completely satisfied with your purchase for any reason, simply open a return request through eBay within 30 days of purchase and we will take care of you promptly.

Thank you for choosing QBS Parts Inc! We truly appreciate your business. If you have any issues whatsoever with your order, please give us the opportunity to resolve it before leaving feedback — we are committed to making every transaction a great experience. Please verify fitment using your engine's model and serial number before purchasing. Feel free to message us with any questions — we're here to help!

QBS Parts, Inc. — Gardena, CA