---
product_id: 530992273
title: "Quicksilver 877770Q1 Extended Life Coolant Anti-Freeze, Pre-Diluted 50/50, 1 Gallon"
brand: "quicksilver"
price: "R1553"
currency: ZAR
in_stock: true
reviews_count: 1
category: "Quicksilver"
url: https://www.desertcart.co.za/products/530992273-quicksilver-877770q1-extended-life-coolant-anti-freeze-pre-diluted-50
store_origin: ZA
region: South Africa
---

# 5-year, 1,000-hour extended life Specifically for MerCruiser sterndrive/inboard engines Pre-diluted 50/50 ethylene glycol mix Quicksilver 877770Q1 Extended Life Coolant Anti-Freeze, Pre-Diluted 50/50, 1 Gallon

**Brand:** quicksilver
**Price:** R1553
**Availability:** ✅ In Stock

## Summary

> 🚤 Keep your engine cool and cruising longer with Quicksilver’s extended life antifreeze!

## Quick Answers

- **What is this?** Quicksilver 877770Q1 Extended Life Coolant Anti-Freeze, Pre-Diluted 50/50, 1 Gallon by quicksilver
- **How much does it cost?** R1553 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/530992273-quicksilver-877770q1-extended-life-coolant-anti-freeze-pre-diluted-50)

## Best For

- quicksilver enthusiasts

## Why This Product

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

## Key Features

- • **Ready-to-Use Formula:** Pre-diluted 50/50 with de-ionized water for hassle-free installation—no mixing, no guesswork.
- • **Silicate & Phosphate Free:** Advanced formula prevents gelling and corrosion, extending engine life and efficiency.
- • **Marine-Grade Compatibility:** Designed exclusively for MerCruiser closed cooling systems, ensuring perfect fit and peak performance.
- • **Industry-Standard Certified:** Meets ASTM D-3306 and D-4340 standards—trusted quality that keeps your marine engine running smooth.
- • **Long-Lasting Engine Protection:** Up to 5 years or 1,000 operating hours of reliable cooling performance—stay worry-free on every voyage.

## Overview

Quicksilver 877770Q1 Extended Life Coolant is a pre-diluted 50/50 ethylene glycol antifreeze designed specifically for MerCruiser closed cooling sterndrive and inboard gasoline engines. It offers up to 5 years or 1,000 operating hours of protection, is silicate and phosphate free to prevent gelling and corrosion, and meets rigorous ASTM standards for marine engine performance.

## Description

Extended Life Coolant/Antifreeze 877770Q1 is for use in all MerCruiser closed cooling systems in stern drive and inboard gasoline engine applications. This coolant is pre-diluted to a 50/50 mix with de-ionized water. See your owner's manual or service manual for specific application and instructions. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.

Review: As expected - Works as expected and has in the past.

## Features

- For use in all MerCruiser closed cooling sterndrive or inboard gasoline engine applications
- Provides 5-year, 1,000 operating hour extended life protection
- Silicate and phosphate free
- Ethylene glycol based, pre-diluted to 50/50 mix with de-ionized water
- Will not cause gelling
- Compatible with conventional anti-freeze
- Meets ASTM D-3306, ASTM D-4340 requirements

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BO88OY6 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #238,699 in Automotive ( See Top 100 in Automotive ) #193 in Antifreezes & Coolants |
| Brand | Quicksilver |
| Brand Name | Quicksilver |
| Color | Unspecified |
| Customer Reviews | 4.7 4.7 out of 5 stars (13) |
| Date First Available | October 24, 2013 |
| Fishing Technique | Spinning, Casting |
| Flash Point | 118 Degrees Celsius |
| Included Components | End Product |
| Item Package Dimensions L x W x H | 11.77 x 7.52 x 3.78 inches |
| Item Weight | 188 Grams |
| Manufacturer | Quicksilver |
| Material | Various Materials |
| Model Name | 877770Q1 Extended Life Coolant Anti-Freeze – Pre-Diluted 50/50 – 1 Gallon |
| Number of Items | 1 |
| Package Weight | 4.23 Kilograms |
| Part Number | 877770Q1 |
| Size | Unspecified |
| Style | Extended Life Coolant |
| Suggested Users | Boat Engine Parts and Accessories |
| UPC | 745061039551 |
| Vehicle Service Type | boats with MerCruiser sterndrive or inboard gasoline engines |

## Product Details

- **Brand:** Quicksilver
- **Flash Point:** 118 Degrees Celsius
- **Liquid Volume:** 1 Gallons
- **Package Information:** jug" or "bottle
- **Vehicle Service Type:** boats with MerCruiser sterndrive or inboard gasoline engines

## Images

![Quicksilver 877770Q1 Extended Life Coolant Anti-Freeze, Pre-Diluted 50/50, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/81AM+bJCUeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ As expected
*by A***R on November 21, 2024*

Works as expected and has in the past.

## Frequently Bought Together

- Quicksilver 877770Q1 Extended Life Coolant Anti-Freeze, Pre-Diluted 50/50 – 1 Gallon
- Quicksilver by Mercury Marine 25W-40 Marine Engine Oil
- Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser Sterndrives, 32 oz

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-10*