---
product_id: 4272643
title: "Sierra 18-2945-9 Marine Drain Screw Gasket - Pack of 2"
brand: "sierra"
price: "€ 14.25"
currency: EUR
in_stock: true
reviews_count: 13
url: https://www.desertcart.gr/products/4272643-sierra-18-2945-9-marine-drain-screw-gasket-pack-2
store_origin: GR
region: Greece
---

# Pack of 2 durable stainless steel gaskets 3/8-16 fastener size precision Fits MerCruiser & Mercury/Mariner O/B's Sierra 18-2945-9 Marine Drain Screw Gasket - Pack of 2

**Brand:** sierra
**Price:** € 14.25
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal with precision and durability—never let a leak slow your adventure!

## Quick Answers

- **What is this?** Sierra 18-2945-9 Marine Drain Screw Gasket - Pack of 2 by sierra
- **How much does it cost?** € 14.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/4272643-sierra-18-2945-9-marine-drain-screw-gasket-pack-2)

## Best For

- sierra enthusiasts

## Why This Product

- Trusted sierra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Value Pack of Two:** Double the protection with two gaskets per pack—always have a spare ready to avoid unexpected delays on the water.
- • **Universal Compatibility:** Seamlessly interchangeable with multiple OEM part numbers across MerCruiser, Mercury, Evinrude, and more—one solution for many engines.
- • **Durable Stainless Steel Build:** Crafted from corrosion-resistant stainless steel to withstand harsh marine environments and extend service life.
- • **Precision Fit for Marine Engines:** Specifically engineered for 3/8-16 drain/fill screws on top marine brands ensuring leak-proof performance.
- • **Easy Installation, Instant Reliability:** Quick to install with a perfect fit, minimizing downtime and maintenance hassle for busy professionals.

## Overview

The Sierra 18-2945-9 Marine Drain Screw Gasket pack includes two stainless steel gaskets designed for 3/8-16 drain/fill screws used in MerCruiser, Mercury/Mariner outboards, and most lower units and sea water pumps. Engineered for a precise fit and corrosion resistance, these gaskets meet or exceed OEM standards, ensuring reliable, leak-free performance in demanding marine environments.

## Description

The Sierra 18-2945-9 Drain Screw Gasket is used with the 3/8-16 drain/fill screw found on all Mercruiser and most Mercury/Mariner O/B's, along with most lower units and sea water pumps. It is interchangeable with the following: Chrysler/Force/US Marine F8186, F50556, F8077, 12-19183, Evinrude/Johnson 307552, Mallory 9-60101, 9-60102, Mercruiser 12-20260B, 12-19183B, 12-20260, 12-19183, 12-191832, 12-191833, Mercury 12-191833, 12-20260, 12-19183, 12-191832. Each drain screw gasket meets or exceeds the original part it replaces. Fit specific, check part numbers before purchase to ensure proper fit.

Review: Did the job - These replacement gaskets for my outboard are easy to install and work great
Review: Perfect fit - Drain screw gaskets were a perfect fit. Good price as well!

## Features

- Used in: most lower units and sea water pumps
- Used with: 3/8-16 drain/fill screw found on all MerCruiser and most Mercury/Mariner O/B's

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000N9M48O |
| Best Sellers Rank | #908,247 in Automotive ( See Top 100 in Automotive ) #1,979 in Powersports Engine Gaskets |
| Brand | Sierra |
| Color | Original Version |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,260) |
| Date First Available | February 6, 2007 |
| Exterior Finish | Machined |
| Fastener Size | 3/8-16 |
| Global Trade Identification Number | 00808282164324 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.16 ounces |
| Item dimensions L x W x H | 4 x 4 x 1 inches |
| Item model number | 18-2945-9 |
| Manufacturer | Sierra |
| Manufacturer Part Number | 18-2945-9 |
| Material | Stainless Steel |
| Metal Type | Stainless Steel |
| Model | SR18.2945.9 |
| Number of Pieces | 2 |
| OEM Part Number | 307552 |
| Outside Diameter | 4 Inches |
| Product Dimensions | 4 x 4 x 1 inches |
| Size | 4 inches |
| UPC | 808282164324 |
| Washer Type | Fender |

## Product Details

- **Exterior Finish:** Machined
- **Fastener Size:** 3/8-16
- **Material:** Stainless Steel
- **Outside Diameter:** 4 Inches
- **Washer Type:** Fender

## Images

![Sierra 18-2945-9 Marine Drain Screw Gasket - Pack of 2 - Image 1](https://m.media-amazon.com/images/I/51R7RP7PwJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Did the job
*by S***N on May 6, 2023*

These replacement gaskets for my outboard are easy to install and work great

### ⭐⭐⭐⭐⭐ Perfect fit
*by R***. on November 27, 2021*

Drain screw gaskets were a perfect fit. Good price as well!

### ⭐⭐⭐⭐⭐ Oil Drain Gasket
*by J***E on August 4, 2020*

Perfect replacement for worn oil drain gasket. No more water intrusion to my lower end gear box.

## Frequently Bought Together

- Sierra 18-2945-9 Marine Drain Screw Gasket - Pack of 2
- Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser Sterndrives, 32 oz
- Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine Boat Outboard Motors (NOT COMPATIBLE WITH VOLVO PENTA)

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**Shop now:** [https://www.desertcart.gr/products/4272643-sierra-18-2945-9-marine-drain-screw-gasket-pack-2](https://www.desertcart.gr/products/4272643-sierra-18-2945-9-marine-drain-screw-gasket-pack-2)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-08-15*