---
product_id: 68625749
title: "Generac 5665 Maintenance Kit for 20kW, 999cc Engine - Keep Your Generator in Top Condition"
brand: "generac"
price: "₨23288"
currency: LKR
in_stock: true
reviews_count: 13
category: "Generac"
url: https://www.desertcart.lk/products/68625749-generac-5665-maintenance-kit-for-20kw-999cc-engine-keep-your
store_origin: LK
region: Sri Lanka
---

# 200-hour/2-year service interval 20kW peak power Complete maintenance kit Generac 5665 Maintenance Kit for 20kW, 999cc Engine - Keep Your Generator in Top Condition

**Brand:** generac
**Price:** ₨23288
**Availability:** ✅ In Stock

## Summary

> ⚡ Keep the lights on and the FOMO off with Generac’s ultimate DIY power kit!

## Quick Answers

- **What is this?** Generac 5665 Maintenance Kit for 20kW, 999cc Engine - Keep Your Generator in Top Condition by generac
- **How much does it cost?** ₨23288 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/68625749-generac-5665-maintenance-kit-for-20kw-999cc-engine-keep-your)

## Best For

- generac enthusiasts

## Why This Product

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

## Key Features

- • **Power Up with Confidence:** Specifically engineered for 20kW, 999cc Generac OHVI engines to keep your home powered without interruption.
- • **DIY Friendly, Warranty Safe:** Perform professional-grade tune-ups yourself and maintain your warranty with factory-original parts.
- • **All-in-One Maintenance Solution:** Includes air filter, oil filter, spark plugs, funnel, chamois, and reminder sticker—everything you need in one sleek kit.
- • **Optimize Longevity & Performance:** Regular maintenance every 200 hours or 2 years ensures your generator runs efficiently when it matters most.
- • **Save Hundreds, Skip the Service Call:** Avoid costly technician fees—this kit empowers you to handle upkeep easily and affordably.

## Overview

The Generac 5665 Maintenance Kit is a comprehensive, factory-original parts set designed for 20kW, 999cc air-cooled standby generators. It includes all essential components for routine upkeep—air and oil filters, spark plugs, and more—enabling homeowners to perform timely maintenance every 200 hours or 2 years. This kit ensures peak generator performance, extends engine life, and helps maintain warranty compliance, all while saving on professional service costs.

## Description

Scheduled maintenance is a necessity for all standby generators. The Air-Cooled Scheduled Maintenance Kits offer all the components necessary to perform a complete maintenance on Generac air-cooled generators. Maintenance is recommended at every 200 hours or 2 years. If running in a dusty environment, more frequent maintenance may be required.

Review: Generac 20KW full house auto generator maint kits - We live in the middle of the "Hurricane Alley" Texas gulf coast and last year we bought and had installed a Generac 20KW totally automatic natural gas fired 999cc generator from Wired Electric, who did a nice job at a decent price. Part of the secret to anything mechanical lasting more than a couple of years is proper and regular maintenance. In the case of the Generac here, once a year you need to change air filter, oil filter, spark plugs and motor oil to keep your warranty current. Wired lets the homeowner do that if they wish so long as they document the maintenance and can prove they did, in deed do the scheduled work at the scheduled intervals and did it properly and correctly. I am a mechanicaly inclined guy so I opted to do that, according to the owners manual and precisley as instructed with genuine replacement parts. OK, so what does a "kit" consist of? Well, in the box there is a spin on replacement oil filter and a dandy paper funnel to put the oil in your motor, a little handy spark plug wrench and two Champion replacement plugs, an exact fit air filter and a drop cloth to help with any spills. I have seen guys charging 40 bucks or more per kit and when I found this provider offering the same for only 15 bucks a pop, I said "stock up". And I did just that. Exactly as described and exactly as the factory originals because it is factory original merchandise at an affordable rate. Oh yeah, our Wired technician, Joe told me to use a high quality 10/W/40 oil when changing it out. Takes 1.9 US quarts which includes oil filter capacity when changed every year. I selected Mobil fully synthetic "High Mileage" oil since this is an air cooled motor and who knows when it may be used for considerable days on end in the event of whatever perils lurk out there? I know my other Texas based reviewer says he does not recommend using synthetics in warm climates (Based on what???) I wanted to back up my recommendation to use synthetic oil in ANY air cooled motor with the following recommendation from aircooled.net's own tech talk forum "Since synthetic oil has better heat transfer qualities than dino oil, your internal engine temperatures will be lower. Things like bearings, especially, will not operate at as high of a temperature as a result. The wider range of temperatures that synthetic oil can withstand is well suited for the air-cooled VW engine. With head temperatures normally between 300-350 degrees, synthetic will not breakdown while lubricating the valve train components at the heads. The better lubricating properties of synthetic in general will lead to a longer engine life as well. On average, when synthetic oil is run in an air-cooled VW engine, head temperatures stay the same, but engine oil temps reduce by anywhere from 10 to 15 degrees. This is in identical engines that have all the correct cooling tin in place, and are not suffering from overheating to begin with. Important note: Do not run synthetic to fix a hot running engine. Find the real reason it's running hot, and fix it!" There you have it. Your Generac is also an AIR COOLED engine and is made of the same materials as a VW, Corvair or any other air cooled engine. This is THEIR recommendation, not mine. Go for it.
Review: Easy DIY maintenance—saves hundreds - ⭐️⭐️⭐️⭐️⭐️ (5/5) Don’t pay $300 for someone else to do it—this kit makes maintenance a breeze! All the parts fit perfectly as advertised, and it’s easy to handle the service yourself. Highly recommend for saving money and keeping your Generac running smoothly.

## Features

- Complete Maintenance Kit: The Generac 5665 Maintenance Kit is specifically designed for 20kW home standby generators, providing all the necessary components for optimal maintenance
- Optimum Performance: Regular tune-ups are essential for keeping your generator running at its best. This kit ensures your generator operates at peak performance when you need it most
- Comprehensive Contents: The kit includes essential items such as an air filter, oil filter, oil funnel, spark plug, chamois, instruction manual, and a convenient reminder sticker
- Compatibility: Designed for air-cooled standby generators with 999cc Generac OHVI engines, ensuring a perfect fit and proper maintenance for reliable operation
- Reliable Power Solution: With this maintenance kit, you have all the necessary parts at hand for regular maintenance tasks, including air filter replacement, oil filter change, spark plug replacement, and more

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003TSFYHY |
| Best Sellers Rank | #39,625 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #66 in Outdoor Generator Cords, Sets & Plugs |
| Brand | Generac |
| Color | Solid Black |
| Customer Reviews | 4.8 4.8 out of 5 stars (551) |
| Department | Unisex Adult |
| Engine Displacement | 999 Cubic Centimeters |
| Engine Power Maximum | 20 Kilowatts |
| Engine Type | 4 Stroke |
| Fuel Type | Gasoline |
| Global Trade Identification Number | 00696471056655 |
| Ignition System Type | Electric start |
| Included Components | Unit^Instruction Guide |
| Item Weight | 1.55 pounds |
| Item model number | 5665 |
| Manufacturer | Generac Power Systems Inc |
| Material | Steel, Cast Iron |
| Model Name | Generac 5665 Air Cooled Home Standby Generator Maintenance Kit, 20kW, 999cc Kit (For HSB models prior to 2013) |
| Output Wattage | 20 Kilowatts |
| Power Source | Gasoline |
| Product Dimensions | 7 x 7 x 6 inches |
| Recommended Uses For Product | Residential |
| Running Wattage | 20 Kilowatts |
| Special Feature | Portable |
| Starting Wattage | 20 Kilowatts |
| UPC | 696471056655 |
| Wattage | 20 KW |

## Product Details

- **Brand:** Generac
- **Color:** Solid Black
- **Fuel Type:** Gasoline
- **Included Components:** Unit^Instruction Guide
- **Item Weight:** 1.6 Pounds
- **Output Wattage:** 20 Kilowatts
- **Power Source:** Gasoline
- **Recommended Uses For Product:** Residential
- **Special Feature:** Portable
- **Wattage:** 20 KW

## Images

![Generac 5665 Maintenance Kit for 20kW, 999cc Engine - Keep Your Generator in Top Condition - Image 1](https://m.media-amazon.com/images/I/71YF1LIApTL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Generac 20KW full house auto generator maint kits
*by B***T on May 9, 2012*

We live in the middle of the "Hurricane Alley" Texas gulf coast and last year we bought and had installed a Generac 20KW totally automatic natural gas fired 999cc generator from Wired Electric, who did a nice job at a decent price. Part of the secret to anything mechanical lasting more than a couple of years is proper and regular maintenance. In the case of the Generac here, once a year you need to change air filter, oil filter, spark plugs and motor oil to keep your warranty current. Wired lets the homeowner do that if they wish so long as they document the maintenance and can prove they did, in deed do the scheduled work at the scheduled intervals and did it properly and correctly. I am a mechanicaly inclined guy so I opted to do that, according to the owners manual and precisley as instructed with genuine replacement parts. OK, so what does a "kit" consist of? Well, in the box there is a spin on replacement oil filter and a dandy paper funnel to put the oil in your motor, a little handy spark plug wrench and two Champion replacement plugs, an exact fit air filter and a drop cloth to help with any spills. I have seen guys charging 40 bucks or more per kit and when I found this provider offering the same for only 15 bucks a pop, I said "stock up". And I did just that. Exactly as described and exactly as the factory originals because it is factory original merchandise at an affordable rate. Oh yeah, our Wired technician, Joe told me to use a high quality 10/W/40 oil when changing it out. Takes 1.9 US quarts which includes oil filter capacity when changed every year. I selected Mobil fully synthetic "High Mileage" oil since this is an air cooled motor and who knows when it may be used for considerable days on end in the event of whatever perils lurk out there? I know my other Texas based reviewer says he does not recommend using synthetics in warm climates (Based on what???) I wanted to back up my recommendation to use synthetic oil in ANY air cooled motor with the following recommendation from aircooled.net's own tech talk forum "Since synthetic oil has better heat transfer qualities than dino oil, your internal engine temperatures will be lower. Things like bearings, especially, will not operate at as high of a temperature as a result. The wider range of temperatures that synthetic oil can withstand is well suited for the air-cooled VW engine. With head temperatures normally between 300-350 degrees, synthetic will not breakdown while lubricating the valve train components at the heads. The better lubricating properties of synthetic in general will lead to a longer engine life as well. On average, when synthetic oil is run in an air-cooled VW engine, head temperatures stay the same, but engine oil temps reduce by anywhere from 10 to 15 degrees. This is in identical engines that have all the correct cooling tin in place, and are not suffering from overheating to begin with. Important note: Do not run synthetic to fix a hot running engine. Find the real reason it's running hot, and fix it!" There you have it. Your Generac is also an AIR COOLED engine and is made of the same materials as a VW, Corvair or any other air cooled engine. This is THEIR recommendation, not mine. Go for it.

### ⭐⭐⭐⭐⭐ Easy DIY maintenance—saves hundreds
*by K***B on August 27, 2025*

⭐️⭐️⭐️⭐️⭐️ (5/5) Don’t pay $300 for someone else to do it—this kit makes maintenance a breeze! All the parts fit perfectly as advertised, and it’s easy to handle the service yourself. Highly recommend for saving money and keeping your Generac running smoothly.

### ⭐⭐⭐⭐⭐ Works well for tune up
*by W***C on December 5, 2024*

Right parts for a very good price.

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-04-23*