Learning how to change oil in Craftsman push lawn mower is a fundamental skill for any homeowner. Changing oil in a Craftsman push mower typically involves tipping the unit carefully to drain old oil, and doing it yourself saves money and extends your mower’s life.
This guide provides clear, step-by-step instructions. We will cover everything from the tools you need to the final check.
Regular oil changes prevent engine wear. They keep your mower running smoothly for seasons to come.
How To Change Oil In Craftsman Push Lawn Mower
This section details the complete oil change process. Follow these steps in order for the best results. Always prioritize safety by working on a level surface and allowing the engine to cool completely.
Tools And Materials You Will Need
Gathering your supplies before you start makes the job quicker. You likely have most of these items in your garage already.
- Fresh SAE 30 or 10W-30 detergent motor oil (check your manual for the exact type and capacity, usually around 20 oz)
- A drain pan or old container to catch the used oil
- A funnel
- A 3/8-inch drive ratchet with extensions
- A socket or wrench to fit your drain plug (often 3/4-inch or 1/2-inch)
- Clean rags or paper towels
- Safety glasses and gloves
- An oil fill spout or a small pour jug
Step 1: Prepare Your Mower
Proper preparation is crucial for a clean and safe oil change. Rushing this step can lead to spills or injury.
Run The Engine To Warm The Oil
Start your mower and let it run for 5-10 minutes. Warm oil flows out more easily, carrying more contaminants with it. This ensures a more complete drain.
Disconnect The Spark Plug Wire
This is the most important safety step. Locate the spark plug wire at the front of the engine and pull it off the plug. This prevents any accidental starting while you are working on the mower. Secure the wire away from the plug.
Position The Mower For Draining
Move your mower to a flat, level area you don’t mind getting a little dirty. Place your drain pan directly under the oil drain port or the oil fill tube, depending on your method.
Step 2: Drain The Old Engine Oil
There are two primary methods to drain oil from a Craftsman push mower: using the drain plug or using the dipstick tube. The drain plug method is usually cleaner.
Method A: Using The Drain Plug
Most newer Craftsman mowers have a dedicated drain plug. It is usually located on the side or bottom of the engine crankcase.
- Locate the drain plug on the engine. It may be a bolt or a plastic knob.
- Place your drain pan directly underneath the plug.
- Using the correct socket or wrench, slowly turn the drain plug counterclockwise. Be prepared for oil to begin flowing as the plug loosens.
- Remove the plug completely and let the oil drain into the pan. Tip the mower gently from side to side to ensure all oil is removed.
- Once drained, wipe the drain plug area clean and reinstall the plug. Tighten it securely, but do not overtighten.
Method B: Using The Dipstick Or Fill Tube
If your model lacks a drain plug, you will need to tip the mower. This method requires caution to avoid fuel or debris issues.
- Ensure the fuel tank is nearly empty or the fuel cap is tightly sealed.
- Position the drain pan next to the mower.
- Carefully tip the mower on its side, with the air filter and carburetor facing UP. This prevents oil and fuel from flooding the air filter.
- Allow the oil to drain completely from the fill tube. You may need to remove the dipstick first.
- After draining, set the mower back upright on a level surface.
Step 3: Refill With New Oil
Now it’s time to add fresh, clean oil. Using the correct type and amount is key to engine health.
- 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 recommended amount of new oil. Start with about 3/4 of the stated capacity (e.g., 15 oz if capacity is 20 oz).
- Wait a minute for the oil to settle into the crankcase, then check the level with the dipstick. Wipe the dipstick clean, reinsert it fully, and pull it out to check.
- Add small amounts of oil as needed until the level reaches the “Full” mark on the dipstick. Do not overfill, as this can damage the engine.
- Securely replace the oil fill cap/dipstick.
Step 4: Final Checks And Cleanup
You’re almost done. A few final steps will ensure your mower is ready for action.
- Reconnect the spark plug wire to the spark plug. Push it on firmly until you hear or feel a click.
- Wipe away any spilled oil from the engine deck and body with a clean rag.
- Start the mower and let it run for a minute. This circulates the new oil. Listen for any unusual noises.
- Turn off the mower and wait a minute. Check the oil level one more time with the dipstick. Add a little more oil if the level has dropped slightly.
- Dispose of the used oil responsibly. Take it to an auto parts store or recycling center that accepts used motor oil. Never pour it on the ground or into a drain.
Choosing The Right Oil For Your Craftsman Mower
Using the correct oil is as important as the change itself. The wrong oil can lead to poor performance or engine damage.
Understanding Oil Viscosity And Types
Viscosity refers to the oil’s thickness. Most Craftsman push mower engines call for SAE 30 weight oil for normal temperatures. For variable climates, 10W-30 is a common recommendation as it flows better in cold weather.
Always use a detergent oil classified as “Service Classification SJ” or later. This information is found on the oil container. Avoid automotive oils with special additives not suited for small engines.
Where To Find Your Mower’s Oil Specifications
The best source of information is your mower’s owner’s manual. It will list the exact oil type and capacity. If you’ve lost the manual, you can often find the model number on a decal under the seat or on the engine housing.
Search for this model number on the Craftsman website to access a digital copy of the manual. As a general rule, most 140cc to 190cc engines hold approximately 20 ounces (0.6 liters) of oil.
Common Mistakes To Avoid
Being aware of these common errors can save you from costly repairs. A little care goes a long way.
Overfilling Or Underfilling The Oil
Both are problematic. Too much oil can cause excessive pressure, leading to oil blowing past seals and into the combustion chamber. This creates blue smoke and can foul the spark plug.
Too little oil means inadequate lubrication, causing rapid engine wear and overheating. Always check the dipstick on a level surface after the oil has had a moment to settle.
Incorrect Disposal Of Used Oil
Used motor oil is a hazardous pollutant. One gallon can contaminate up to one million gallons of fresh water. Always pour the used oil from your drain pan into a sealed container, like the empty new oil bottle.
Take it to a certified collection site. Most auto parts stores and service stations offer free used oil recycling. They often accept oil filters as well.
Forgetting To Reconnect The Spark Plug
It’s an easy step to overlook after you’ve finished the job. If the spark plug wire is not reconnected, the engine will not start. You might think you’ve done something wrong during the oil change. Always double-check this connection before trying to start the mower.
Maintenance Schedule And Tips
An oil change is part of a broader maintenance routine. Keeping a schedule ensures your mower remains reliable.
How Often Should You Change The Oil?
For most Craftsman push mowers, you should change the oil after the first 5 hours of operation for a new mower. After that, change it every 25-50 hours of use or at least once per mowing season.
If you use your mower heavily or in dusty conditions, change the oil more frequently. At the very least, change the oil at the start of each mowing season to remove any condensation or contaminants that accumulated over the winter.
Complementary Maintenance Tasks
While you have your tools out, consider these other quick tasks that promote engine health and performance:
- Replace the air filter. A clogged filter restricts airflow and reduces engine efficiency.
- Sharpen or replace the mower blade. A sharp blade cuts grass cleanly, promoting a healthier lawn.
- Check the spark plug. Clean off any debris or replace it if it’s worn or fouled.
- Inspect the wheels and cables for wear and proper operation.
Frequently Asked Questions
What Type Of Oil Does A Craftsman Push Mower Use?
Most Craftsman push mowers with a Briggs & Stratton engine use SAE 30 detergent motor oil for temperatures above 40°F. For use in a wider temperature range, 10W-30 is commonly recommended. Always verify in your owner’s manual.
Can I Change The Oil In My Lawn Mower Without A Drain Plug?
Yes, you can. For mowers without a drain plug, you must carefully tip the mower on its side with the air filter facing upward. Drain the oil out through the fill tube. Be cautious to prevent fuel from leaking into the air filter assembly.
How Much Oil Goes In A Craftsman Push Mower?
The typical oil capacity for a standard Craftsman push mower engine is around 20 ounces (0.6 liters or about 2.5 cups). However, capacities can vary from 18 to 22 ounces. The only way to be sure is to check your manual and always use the dipstick to confirm the correct fill level.
Is It Necessary To Change Lawn Mower Oil Every Year?
Yes, it is a good practice. Even if you haven’t reached the recommended operating hours, changing the oil annually removes moisture, fuel dilution, and acids that can form over time, especially during storage. This prevents corrosion and keeps the engine internals in good condition.
Where Is The Oil Drain Plug On A Craftsman Mower?
The oil drain plug is typically located on the side or bottom of the engine crankcase. It often looks like a standard bolt or a plastic knob. On some models, it may be positioned near the base of the engine, just above the mower deck. Refering to your manual will give you its exact location.