---
product_id: 2410457
title: "Sierra 18-3899 Marine Cover Gasket for Johnson/Evinrude Outboard Motor"
brand: "sierra"
price: "11707 Ft"
currency: HUF
in_stock: true
reviews_count: 8
url: https://www.desertcart.hu/products/2410457-sierra-18-3899-marine-cover-gasket-for-johnson-evinrude-outboard
store_origin: HU
region: Hungary
---

# Marine-grade durability Precision machined fit OEM exact replacement Sierra 18-3899 Marine Cover Gasket for Johnson/Evinrude Outboard Motor

**Brand:** sierra
**Price:** 11707 Ft
**Availability:** ✅ In Stock

## Summary

> ⚓ Seal your engine’s power with precision and durability!

## Quick Answers

- **What is this?** Sierra 18-3899 Marine Cover Gasket for Johnson/Evinrude Outboard Motor by sierra
- **How much does it cost?** 11707 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/2410457-sierra-18-3899-marine-cover-gasket-for-johnson-evinrude-outboard)

## 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

- • **Compact & Lightweight:** Ultra-light 0.317 oz gasket with a precise 0.39-inch dimension for easy installation.
- • **Trusted Sierra Quality:** Backed by Sierra’s industry-leading customer satisfaction warranty for peace of mind.
- • **Perfect OEM Compatibility:** Seamlessly replaces original Johnson/Evinrude parts for models 20-35 HP.
- • **Built to Last in Saltwater:** Crafted to resist corrosion and wear in harsh marine environments.
- • **Engineered for High Performance:** Designed to withstand the toughest marine conditions and high horsepower demands.

## Overview

The Sierra 18-3899 Marine Cover Gasket is a precision-machined, OEM-compatible replacement part designed for Johnson/Evinrude 20-35 HP outboard motors. Lightweight and compact, it offers superior durability in harsh marine environments and comes backed by Sierra’s trusted warranty, ensuring reliable engine performance and longevity.

## Description

Sierra products are engineered to meet today’s high horsepower engine demands and stand up in the harsh marine environment. All Sierra products meet or exceed the original equipment part it replaces. Sierra supplies many OEM engine manufacturers and boat builders hundreds of quality parts every day

## Features

- For : 20, 25, 25C, 30, 35
- All Sierra parts qualify for and are covered under Sierra's industry leading customer satisfaction warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Sierra |
| Shape | Round |
| UPC | 808282244118 |
| Manufacturer | Sierra |
| Unit Count | 1.0 Count |
| Global Trade Identification Number | 00808282244118 |
| Model | Water Cover Gasket |
| Item Weight | 0.317 ounces |
| Product Dimensions | 0.39 x 0.39 x 0.39 inches |
| Item model number | 18-3899 |
| Is Discontinued By Manufacturer | No |
| Exterior | Machined |
| Manufacturer Part Number | 18-3899 |
| OEM Part Number | OMC 327674 |

## Product Details

- **Brand:** Sierra
- **Shape:** Round
- **UPC:** 808282244118
- **Manufacturer:** Sierra
- **Unit Count:** 1.0 Count

## Images

![Sierra 18-3899 Marine Cover Gasket for Johnson/Evinrude Outboard Motor - Image 1](https://m.media-amazon.com/images/I/51oGMaBxkgL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 35 hp
*by P***T on September 11, 2021*

Gasket lined up and fit perfectly on 1979 Johnson 35hp. No leaks. I’m very happy and shipping was on time as projected. Thank you.

### ⭐⭐⭐⭐⭐ Worked great!
*by J***3 on June 11, 2022*

No leaks even with two snapped off bolts. Be careful when removing the bolts, i was working on an engine that sat for 20 years, sprayed the bolts with blaster for 2 days and still rung off two bolts.

### ⭐⭐⭐⭐⭐ Perfect fit....
*by W***K on July 29, 2021*

Fit was perfect. Problem solved!

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**Shop now:** [https://www.desertcart.hu/products/2410457-sierra-18-3899-marine-cover-gasket-for-johnson-evinrude-outboard](https://www.desertcart.hu/products/2410457-sierra-18-3899-marine-cover-gasket-for-johnson-evinrude-outboard)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-23*