Learning how to change the oil on a Craftsman lawn mower is a simple task that every owner should master. A Craftsman mower’s oil change routine is a fundamental aspect of its upkeep, preventing sludge buildup inside the engine. This guide will walk you through the entire process, ensuring your mower runs smoothly for seasons to come.
How To Change The Oil On A Craftsman Lawn Mower
Changing your mower’s oil is similar to changing oil in a car, but much simpler. You will need a few basic tools and about 30 minutes of your time. Always refer to your specific model’s owner’s manual for the most accurate information, as procedures can vary slightly.
Tools And Materials You Will Need
Before you start, gather all the necessary items. Having everything ready makes the job faster and cleaner. You likely have most of these tools already in your garage.
- Fresh engine oil (Check your manual for the correct type and quantity, typically SAE 30 or 10W-30)
- A new oil filter (if your model has one)
- An oil drain pan or a shallow container
- A funnel
- Socket wrench or adjustable wrench
- Rags or paper towels
- A pair of gloves (optional but recommended)
- Safety glasses
Preparing Your Lawn Mower For The Oil Change
Proper preparation is key to a mess-free and safe oil change. Never attempt to change the oil immediately after using the mower.
Step 1: Run The Engine To Warm The Oil
Start your mower and let it run for 5-10 minutes. Warm oil flows out of the engine much more easily and completely than cold, thick oil. This helps remove more contaminants.
Step 2: Disconnect The Spark Plug Wire
This is the most critical safety step. Locate the spark plug wire at the front of the engine and disconnect it from the spark plug. This prevents the engine from accidentally starting while you are working on it. Secure the wire away from the plug.
Step 3: Position The Mower For Drainage
You have two main options for positioning. The first is to tip the mower on its side with the air filter and carburetor facing up. This is common for older models. The second, and often easier, method is to use a car ramp to lift the front of the mower, providing clearance for your drain pan.
The Oil Change Process Step By Step
Now you are ready to remove the old oil. Follow these steps carefully to avoid spills and ensure you get all the old oil out.
- Locate the Drain Plug: Find the oil drain plug on the bottom of the mower’s engine deck. It is usually a hexagonal bolt. Place your oil drain pan directly underneath it.
- Remove the Drain Plug: Using your wrench, carefully loosen and remove the drain plug. Let the oil drain completely into the pan. This may take a few minutes.
- Replace the Drain Plug: Once the oil stops dripping, wipe the drain plug and the drain hole clean. Reinstall the drain plug and tighten it securely, but do not overtighten it as this can strip the threads.
Changing The Oil Filter (If Applicable)
Many Craftsman riding mowers and some newer push models have an oil filter. If yours does, you should replace it with every oil change.
- Locate the oil filter on the side of the engine. It looks like a small metal canister.
- Place your drain pan under the filter to catch any drips.
- Use an oil filter wrench to turn the filter counter-clockwise and remove it.
- Before installing the new filter, apply a thin layer of clean oil to the rubber gasket on the top of the new filter.
- Screw the new filter on by hand until the gasket makes contact, then tighten it an additional three-quarter turn. Do not use the wrench for the final tighten.
Adding The New Engine Oil
With the old oil drained and the plug secure, you can add fresh oil. This is where using the correct type and amount is crucial.
- Locate the oil fill tube on the top of the engine. It usually has a dipstick attached to the cap.
- Insert your funnel into the fill tube.
- Slowly pour in the new oil. Do not pour in the entire amount recommended at once. Start with about 3/4 of the stated capacity.
- Wait a minute for the oil to settle, then use the dipstick to check the level. Wipe the dipstick clean, reinsert it fully, then pull it out to check. The oil should be between the “Full” and “Add” marks.
- Add small amounts of oil as needed until the level is correct. Overfilling can be as harmful as underfilling, so take your time.
- Once filled, replace the oil fill cap securely.
Final Checks And Cleanup
You’re almost done. A few final steps will ensure everything is working properly and your workspace is clean.
- Reconnect the spark plug wire to the spark plug.
- Start the mower and let it run for a minute. This circulates the new oil throughout the engine. Listen for any unusual noises.
- Turn off the mower and wait 30 seconds. Check around the drain plug and oil filter for any leaks. Also, recheck the oil level with the dipstick, as some oil will now be in the filter.
- Properly dispose of the used oil and filter. Most auto parts stores and recycling centers accept used oil for free. Never pour it on the ground or into a drain.
- Wipe down any oil spills on the mower with a rag to prevent dirt from sticking.
Choosing The Right Oil For Your Craftsman Mower
Using the correct oil is vital for engine longevity. The best source is always your owner’s manual. For most Craftsman mowers with Briggs & Stratton or Kohler engines, a standard SAE 30 weight oil is recommended for temperatures above 40°F. For variable temperatures, a multi-viscosity oil like 10W-30 is often suitable. Look for oil marked for “small engines” or “lawn mower use,” as it may contain additives beneficial for these engines.
Common Mistakes To Avoid
Even simple tasks have pitfalls. Being aware of these common errors will help you do the job right the first time.
- Not Warming the Engine: Draining cold oil leaves sludge and debris behind.
- Forgetting Safety: Always disconnect the spark plug. An accidental engine start can cause serious injury.
- Over-tightening: Stripping the drain plug or oil filter housing is a common and frustrating mistake. Hand-tight plus a little more is usually sufficient.
- Using the Wrong Oil: Automotive oil is not always formulated for the high-temperature operation of a small air-cooled engine.
- Improper Disposal: Used motor oil is a pollutant. Always recycle it responsibly.
When To Change Your Lawn Mower Oil
A regular schedule keeps your engine healthy. A good rule of thumb is to change the oil at least once per mowing season, or every 25-50 hours of operation. If you use your mower extensively, consider changing it twice a season. Always change the oil if it appears very dark, dirty, or has a burnt smell. For brand-new mowers, an initial break-in oil change after the first 5 hours of use is often recommended to remove any initial metal particles from the new engine.
Frequently Asked Questions
What type of oil does a Craftsman lawn mower use?
Most Craftsman walk-behind mowers use SAE 30 or 10W-30 detergent oil. For riding mowers, check your manual, as some may require a different grade like 10W-40. Always confirm the oil capacity and type in your model’s owner’s manual.
Can I change the oil without a drain plug?
Yes, some older models lack a drain plug. For these, you typically need to tip the mower on its side (with the air filter up) and carefully pour the oil out through the fill tube into a pan. Using a fluid extractor pump through the dipstick tube is another clean option.
How often should I change the oil in my Craftsman riding mower?
For Craftsman riding mowers, plan to change the oil every 50 hours of operation or at least once per season, whichever comes first. Heavy use or dusty conditions may require more frequent changes. Don’t forget to change the oil filter each time as well.
Where is the oil drain plug on a Craftsman mower?
The oil drain plug is almost always located on the bottom of the engine crankcase. On riding mowers, it is typically near the center of the mower deck underneath. On push mowers, it is on the side or bottom of the engine. Consult your manual for the exact location for your model.
Completing an oil change on your Craftsman mower is a straightforward and satisfying piece of maintenance. By following these steps, you protect your engine from wear, ensure reliable starts, and extend the life of your equipment. Regular oil changes are a small investment of time that pays off with a mower that performs well for many years.