---
product_id: 195689549
title: "SCP-128377 Major Rebuild Kit with Shaft for 3\" Cover Yanmar Marine Water Pumps 128377-42500, 128990-42500, 128990-42510"
brand: "staycoolpumps"
price: "104912 Ft"
currency: HUF
in_stock: true
reviews_count: 6
url: https://www.desertcart.hu/products/195689549-scp-128377-major-rebuild-kit-with-shaft-for-3-cover
store_origin: HU
region: Hungary
---

# Compatible with 3" Yanmar marine pumps Precision-fit shaft included DIY-friendly rebuild kit, no press needed SCP-128377 Major Rebuild Kit with Shaft for 3" Cover Yanmar Marine Water Pumps 128377-42500, 128990-42500, 128990-42510

**Brand:** staycoolpumps
**Price:** 104912 Ft
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your marine pump sailing smoothly—repair like a pro, anywhere!

## Quick Answers

- **What is this?** SCP-128377 Major Rebuild Kit with Shaft for 3" Cover Yanmar Marine Water Pumps 128377-42500, 128990-42500, 128990-42510 by staycoolpumps
- **How much does it cost?** 104912 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/195689549-scp-128377-major-rebuild-kit-with-shaft-for-3-cover)

## Best For

- staycoolpumps enthusiasts

## Why This Product

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

## Key Features

- • **DIY Ready:** No press required—perfect for on-the-go or at-sea maintenance
- • **Cross-Brand Fit:** Works with select Johnson and GM pump models for versatile use
- • **Seamless Compatibility:** Fits 1997+ European Yanmar 3" cover pumps with o-ring seal
- • **Marine-Grade Durability:** Engineered for reliable performance in harsh sea conditions
- • **All-in-One Rebuild Solution:** Includes a fully assembled shaft for hassle-free repairs

## Overview

The SCP-128377 Major Rebuild Kit with Shaft is a precision-engineered repair solution designed for 3" Yanmar marine water pumps (models 2YM15, 3YM20, 3YM30) and compatible Johnson and GM pumps. Featuring a fully assembled shaft, this kit enables professional-grade rebuilds without the need for a press, making it ideal for on-board or remote repairs. Manufactured in the USA, it fits pumps with o-ring seals from 1997 onward, ensuring durable, reliable marine performance.

## Description

Contains Aftermarket Parts. Includes: IMPELLER, 128990-42200 , old # X08810B COVER O-RING, X02173476 , old # X0506597 , early models used X0506523 SLINGER O-RING, X02173432 , old # X0506513 RETAINING RING, X00370012 , old # X0534501 RETAINING RING, X00371732 , old # X0534511 SPACER PLATE, X0145050 BEARING, X03431760 , old # X0508124 BEARING, X03431748 , old # X0508130 SS SCREWS, X0504163 Replaces 128377-42520 LIP SEAL, X02233010 , old # X0529139 END COVER, X0142398 SHAFT, 01-46541 ,nut ,nut ,washer (2). Impeller Specifications: Diameter: 50.8mm (2") Width: 22mm (0.87") Shaft: 12mm (0.47") Pin Drive 6 Blades All YM and some GM series engines 2YM15 2004 & up 3YM20 2004 & up 3YM27A 2004 & up 3YM30 2004 & up 3YM30R 2004 & up Fits all 2GM20/3GM30 YEU series. The GM YEU series are European built models from 1997-2004 and have the letter "E" prefixing the engine serial number (example serial no. E00123) All models below. 2GM20-YEU , 1997 and later 2GM20C-YEU , 1997 and later 2GM20F-YEU , 1997 and later 2GM20FC-YEU , 1997 and later 3GM30-YEU , 1997 and later 3GM30C-YEU , 1997 and later 3GM30F-YEU , 1997 and later 3GM30FC-YEU , 1997 and later

## Features

- This fits the 1997 and newer European made Yanmar models with the 3" (76mm) cover that use an o-ring. ( If your model uses a gasket this is NOT the correct kit ).
- Fits the following Yanmar Models: 2YM15, 3YM20, 3YM30, and some GM models
- Fits Yanmar Pumps: 128990-42500 , 128990-42510 , 128377-42500 , 128397-42500
- Fits Johnson Pumps: 10-24509-01 , 10-24509-02 , 10-13337-01 , 10-13492-01
- This kit with a new assembled shaft is great for people that do not have a press, or want to repair the pump at sea.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | StayCoolPumps |
| Brand | StayCoolPumps |
| Model | SCP-12837742500 |
| Package Dimensions | 12.5 x 9.5 x 0.5 inches |
| Country of Origin | USA |
| Item model number | SCP-12837742500 |
| Manufacturer Part Number | SCP-12837742500 |
| OEM Part Number | 128990-42500 , 128990-42510 , 128377-42500 , 128397-42500 , 10-24509-01 , 10-24509-02 , 10-13337-01 , 10-13492-01 |

## Product Details

- **Brand:** StayCoolPumps
- **Material:** neoprene , brass , stainless steel
- **Manufacturer:** StayCoolPumps
- **OEM Part Number:** 128990-42500 , 128990-42510 , 128377-42500 , 128397-42500 , 10-24509-01 , 10-24509-02 , 10-13337-01 , 10-13492-01
- **UPC:** 733781091119

## Images

![SCP-128377 Major Rebuild Kit with Shaft for 3" Cover Yanmar Marine Water Pumps 128377-42500, 128990-42500, 128990-42510 - Image 1](https://m.media-amazon.com/images/I/81EWV9b-RoL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ DIY made easy
*by T***N on March 17, 2024*

I needed to rebuild the water pump on my Yanmar because it was leaking. Trying to replace the bearings looked beyond my scope and replacing the entire put was expensive and a waste. This was the perfect compromise. Much easier to replace the entire pre assembled shaft . More expensive than just the bearings, but worth the money.

### ⭐⭐⭐⭐⭐ Great kit!
*by H***A on April 21, 2023*

This is a high quality and complete raw water pump rebuild kit. The new shaft with the bearings already pressed on is a huge convenience and time saver. After using this kit to rebuild my pump it is working perfectly with no leaks!! Highly recommended!

### ⭐⭐⭐⭐⭐ Return the pump
*by B***K on April 12, 2023*

Stay cool pumps was vere helpful have used this company before all was great to work with.

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-25*