---
product_id: 8437954
title: "MERCRUISER ALPHA ONE UPPER BOX GEARCASE SEAL KIT | GLM Part Number: 87500; Sierra Part Number: 18-2648; Mercury Part Number: 26-32511A1"
brand: "glm marine"
price: "S/.251"
currency: PEN
in_stock: true
reviews_count: 4
category: "Glm Marine"
url: https://www.desertcart.pe/products/8437954-mercruiser-alpha-one-upper-box-gearcase-seal-kit-glm-part
store_origin: PE
region: Peru
---

# Precision Engineering Durable Components Easy Installation MERCRUISER ALPHA ONE UPPER BOX GEARCASE SEAL KIT | GLM Part Number: 87500; Sierra Part Number: 18-2648; Mercury Part Number: 26-32511A1

**Brand:** glm marine
**Price:** S/.251
**Availability:** ✅ In Stock

## Summary

> 🚤 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** MERCRUISER ALPHA ONE UPPER BOX GEARCASE SEAL KIT | GLM Part Number: 87500; Sierra Part Number: 18-2648; Mercury Part Number: 26-32511A1 by glm marine
- **How much does it cost?** S/.251 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/8437954-mercruiser-alpha-one-upper-box-gearcase-seal-kit-glm-part)

## Best For

- glm marine enthusiasts

## Why This Product

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

## Key Features

- • **Robust Durability:** Engineered to withstand harsh marine environments.
- • **Seamless Compatibility:** Designed for GLM, Sierra, and Mercury models.
- • **Cost-Effective Maintenance:** Save on repairs with this essential kit.
- • **User-Friendly Installation:** Get back on the water quickly with straightforward setup.
- • **Comprehensive Seal Protection:** Prevents leaks and enhances gearcase longevity.

## Overview

The MERCRUISER ALPHA ONE UPPER BOX GEARCASE SEAL KIT is a high-quality maintenance solution compatible with GLM, Sierra, and Mercury parts. This kit ensures robust protection against leaks, enhancing the durability and performance of your marine gearcase.

## Description

For #1 and Alpha One TO 1997

Review: Nice kit - Good quality gasket kit at a great price. A schematic drawing added for reference would be nice, but still not a complaint as you should have a manual for torque values anyway.
Review: As described. - As described worked good for alpha one gen 2.

## Features

- GLM Part Number: 87500; Sierra Part Number: 18-2648; Mercury Part Number: 26-32511A1

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004AQZBFO |
| Best Sellers Rank | #430,837 in Automotive ( See Top 100 in Automotive ) #484 in Powersports Seals |
| Brand Name | GLM MARINE |
| Customer Reviews | 4.8 out of 5 stars 60 Reviews |
| Manufacturer | GLM |
| Part Number | 87500 |

## Images

![MERCRUISER ALPHA ONE UPPER BOX GEARCASE SEAL KIT | GLM Part Number: 87500; Sierra Part Number: 18-2648; Mercury Part Number: 26-32511A1 - Image 1](https://m.media-amazon.com/images/I/61Hl-PWgWWL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice kit
*by T***. on May 18, 2016*

Good quality gasket kit at a great price. A schematic drawing added for reference would be nice, but still not a complaint as you should have a manual for torque values anyway.

### ⭐⭐⭐⭐ As described.
*by N***I on October 6, 2019*

As described worked good for alpha one gen 2.

### ⭐⭐⭐⭐ Four Stars
*by R***. on September 22, 2015*

Worked well on my 120 HP I drive.

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---

*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-06-24*