Warning: Undefined array key 1 in /home/u668494703/domains/renewablecop.com/public_html/wp-content/themes/voice/core/helpers.php on line 518

Warning: Trying to access array offset on value of type null in /home/u668494703/domains/renewablecop.com/public_html/wp-content/themes/voice/core/helpers.php on line 518

Warning: Undefined array key 1 in /home/u668494703/domains/renewablecop.com/public_html/wp-content/themes/voice/core/helpers.php on line 518

Warning: Trying to access array offset on value of type null in /home/u668494703/domains/renewablecop.com/public_html/wp-content/themes/voice/core/helpers.php on line 518
Articles Generators Informational Topics

How To Drain Oil From Generator – Perfect Solution

The generator is dependable throughout the rainy season, thanks to regular servicing.

New oil must be changed. The improved oil not only greases crucial engine components and facilitates and streamlines the start procedure.

Most individuals know how to change generator oil and complete it at home. 

You were curious whether you and the family members would still have access to electricity, warmth, and amusement in the event of a thunderstorm, in addition to freezers and the capability to prepare food.

How to Drain Oil From Generator

Most likely, you purchased your generator to maintain the protection and pleasure of your household.

You should know how to drain oil from the generator due to its frequent use.

How To Change Oil In A Generator?

Draining old oil from generators requires skills, knowledge, and tools to do it easily.

First, wear safety goggles and unplug the spark wire. After that, open the drain cap, drain cold oil, and remove debris and dirt.

Once you have exhausted, clean the oil filter. Finally, plug in the things and attach the spark wires.

Things You Need:

Whenever you Are going to Drain oil from the generator, you will need

  • Fresh oil (correct type)
  • Empty the oil container or tank
  • A fresh oil filter 
  • A new brush and towel
  • Protective goggles and gloves
  • Lubricating oil wrench and ratchet
  • Spanner wrench (correct size)
  • Flat and Phillips screwdriver
  • Oil spout

Steps Of How To Drain Oil From Generator:

Consider your security when replacing the used oil and grease cleaner in the generator—strap on little safety goggles and mittens.

Be sure you possess all the appropriate tools on hand as well. After completing all of this, you may go on to the subsequent phases.

Heating Used Oil:

To simplify the drain, heat the engine’s old oil. Oils that are heated up are more liquid and consistent.

Turn on the machine and let it operate for several moments. The old oil ought to be heated sufficiently to switch off the general.

Set The Generator On Slabs:

Obtain a few similar blocks and set them on flat ground as in the following step. We like to put bricks on our big, strong table to avoid bending our back sides far too much.

After that, you may place your generator on bricks, so the oil drain plug is free to move around. 

Ensure your machine is securely situated and steady and won’t tumble off your blocks. Just be aware that specific generators are too hefty for one person to carry.

If you choose to lift a big piece of equipment, you must have at least one additional set of hands to prevent harm.

Disconnect The Spark Wire:

Find the spark plug and disconnect it when your machine is securely positioned on sturdy blocks. By doing this, a motor with no lubrication won’t accidentally start.

Even though the spark plug is often readily available, some brands and versions conceal this critical engine component beneath plastic coverings. 

Consult your owner’s handbook if you’re having trouble finding your spark plug. It could reveal where it might be lurking and how to approach it most effectively.

Additionally, certain manufacturers and more potent versions could come with several spark plugs. For this reason, you should constantly refer to the directions handbook with your generator.

You must cut the wire attached to your spark plug after determining where it is situated.

To accomplish this, you must securely grasp the spark wire boots, rotate them that way, and then take off at any time.

Rotating lessens the cable’s stress and aids in detaching the junction from the spark plug.

By doing this, you may securely and quickly tear the spark plug wire-free, even if it has mild corrosion. Remember not to yank the wire section as you might soon destroy it.

Get Ready To Drain Old Oil:

You must find the oil drain plug after the spark wire has been disconnected and placed safely. Typically, a 3/8″ but with a round or hexagonal head is used.

Reading through the owner’s handbook is the safest approach to finding it because the size and form of this nut are very clearly on the manufacturer and version of your generator.

You may find the details you require to safely replace the oil and oil filter (if applicable).

Take your moment to thoroughly wash away any oil residues and dirt if the drain plug and the components are filthy so that you can see what was going on there correctly. 

Don’t forget to position the oil pan or unfilled canister underneath the drain plug to capture every drop of used oil from your generator.

To speed up the following step of emptying the old oil, you may also unscrew the oil filler cap.

Ensure that anything can enter the aperture by making sure it is secure.

Putoff The Oil Plug:

The following solution is to extract the oil drain cap after installing the drainage pan to collect any oil leaks from your generator.

A ratchet and a 3/8″ socket are often required. We advise only loosening the plug with the ratchet.

It would help if you took the ratchet and socket out when it is free and carefully unscrewed the remaining threads.

Just remember that perhaps the old oil will begin to flow out of the engine as quickly as you release the plug.

Make every effort to pour the used oil into the drain pan. Don’t toss this item in the garbage since it can readily pollute the land and water.

Change The Old Oil Filter:

One also should change the oil filter if the generator has one. Some individuals drain their old oil without changing the oil in the generator filter to conserve expense.

It’s not an excellent notion to put your fresh crude over to the old, “dirty” filter.

Your generator’s “life” may be substantially extended, and its engine can be kept from breaking down if the oil and filter are replaced simultaneously.

Place the old filter inside your wrench and gradually remove it. Once free, take your twist out and finish the remaining unscrewing by hand. 

Constantly wear gloves when handling since the oil filter might get pretty warm.

Get a drainage pan underneath your filters since part of the old oil may leak out from the aperture or the filter itself.

Check the oil filter adapter’s bonding area for dirt or gasket materials and wash it if required.

Take your replacement filter, and use fresh engine oil to grease the seal. 

Begin by physically screwing it until the gasket connects with the filtration connector.

Next, spin the filters one further 1/2 to 3/4 turn while holding a wrench or pair of pliers.

Be careful not to overtighten or harm the filters (surprisingly, it is pretty fragile).

Additionally, remember to carefully dispose of spent engine crude oil filters at nearby automotive parts retailers.

Pour Fresh Oil And Tighten The Screw:

After installing your filter cartridge, you must put the oil drain cap.

Again, physically drive it in and then use a socket wrench to secure it. Even if you’ve never previously, you must take off the oil filling cap before inserting a funnel.

The additional oil should now be progressively poured into your generator. 

Look through the authorized manager’s handbook to find out what kind of oil you have to drop in, as the kind of oil and the quantity necessary vary depending on the manufacturer and engine version.

Additionally, the type of oil you could require varies with the time and location of the area where you’ll be utilizing your generators.

Attach Your Spark Wire Again:

Reconnecting the ignition system wire is the final action you must take.

Once more, grasp the wire’s gear and slip it across the wiring loom top. Following that, push it in completely.

Frequently, when the connection settles into place, you would either sense or perhaps audible a click.

After reconnecting your plug, you may finish by putting back any coverings you removed to access it.

To grease, the engine, turn on your generators and let them operate for a few minutes. This will enable the fresh oil to circulate thoroughly.


We have provided you with the finest instructions on draining oil from the generator. For the engine to perform smoothly and optimally, regular oil drainage is an essential component of owning a generator. Changing the oil is one of the most crucial maintenance tasks a generator owner can perform to guarantee peak performance and increase equipment longevity. Your generator can produce the most horsepower possible thanks to improved engine performance.

See More:

Do I Need A Special Extension Cord For A Generator
What Kind Of Energy Transformation Takes Place In A Generator

Video Help:

Watch this video for more information.

Post Disclaimer

Renewablecop is is a participant in the Amazon Services LLC Associates Program. When you purchase through links on our site, we may earn an affiliate commission. Learn more

About the author

Anthony Miller

Hello Guys! I am Anthony Miller, a high dynamo, communicative author, and editor of the Renewable Cop, always providing amazing, engaging, informative, unique, highly researched, and verified content based on all sorts of generators. Read more.

Leave a Comment