Learning how to change oil on Craftsman riding lawn mower is a fundamental skill for any homeowner. Servicing the oil on a Craftsman riding mower helps ensure the transmission and engine operate without undue friction. Performing this routine maintenance yourself saves money and extends the life of your machine significantly.
This guide provides clear, step-by-step instructions. We will cover everything from gathering tools to disposing of the old oil properly.
You can complete this task in under an hour with basic tools. Let’s get started.
How To Change Oil On Craftsman Riding Lawn Mower
Before you begin, it’s crucial to gather all necessary supplies and prepare your mower. Working in an organized manner makes the process smoother and safer. Always prioritize safety by working in a well-ventilated area and allowing the engine to cool.
Tools And Materials You Will Need
Having the right items on hand prevents interruptions. You likely have most of these in your garage already.
- Fresh engine oil (Check your owner’s manual for the correct type and quantity, typically SAE 30 or 10W-30 for warmer climates)
- A new oil filter (specific to your Craftsman model)
- An oil drain pan or bucket (with at least a 2-quart capacity)
- A socket wrench set or combination wrenches
- An oil filter wrench (strap-type or cap-style)
- A funnel
- Clean rags or paper towels
- Latex or nitrile gloves
- A piece of cardboard or a tarp to kneel on
- A container for old oil disposal (like the empty new oil jug)
Safety Precautions And Preparation
Never underestimate the importance of safety. A cool engine and a stable mower are non-negotiable starting points.
- Park the mower on a flat, level surface. Engage the parking brake fully.
- Turn the ignition key to the “OFF” position and remove it.
- Disconnect the spark plug wire. This is a critical step to prevent any accidental engine starts.
- Allow the engine to cool completely. Working on a hot engine can cause severe burns and the oil will drain faster if its warm, but not scalding hot.
- Place your cardboard or tarp under the drain area to catch any spills.
Locating Your Model Number
Your Craftsman riding mower’s model number is essential for buying the correct oil filter. You can usually find it on a sticker or plate located under the seat, on the frame behind the rear wheels, or on the side of the engine cowl. Write this number down before purchasing supplies.
Step-By-Step Oil Change Procedure
Follow these steps in order for a successful oil change. Taking your time here ensures a clean job and proper engine protection.
Step 1: Draining The Old Engine Oil
First, you need to remove the old, dirty oil from the engine crankcase.
- Locate the oil drain plug. On most Craftsman riders, it is on the left or right side of the engine block, near the base. Consult your manual if your unsure.
- Place your drain pan directly beneath the drain plug.
- Using the correct size wrench, slowly turn the drain plug counterclockwise. Once loose, carefully unscrew it by hand the last few turns, applying slight pressure to keep it from falling into the pan.
- Allow all the oil to drain completely. This may take several minutes. Tip: Gently rocking the mower side-to-side can help dislodge any trapped oil.
- Once drained, clean the drain plug and its threads with a rag. Inspect the washer for damage and replace it if necessary.
- Reinstall and tighten the drain plug securely by hand, then give it a final snug turn with the wrench. Avoid overtightening, which can strip the threads.
Step 2: Removing The Old Oil Filter
The oil filter traps contaminants and must be replaced with every oil change. It is usually located on the side of the engine.
- Position your drain pan under the filter to catch residual oil that will spill out.
- Use your oil filter wrench to loosen the old filter. Turn it counterclockwise.
- Once loose, unscrew it completely by hand. Be prepared for oil to drip down the engine side—this is normal.
- Wipe the filter mounting surface on the engine clean with a rag. Ensure the old filter’s gasket did not stick to the engine.
Step 3: Installing The New Oil Filter
Proper filter installation prevents leaks and ensures good oil flow.
- Take your new filter and dip your finger in the fresh new oil. Lightly coat the rubber gasket on the top of the new filter with a thin layer of clean oil. This helps create a good seal.
- Screw the new filter onto the engine by hand. Turn it clockwise until the gasket makes contact with the mounting surface.
- Once it’s hand-tight, give it an additional three-quarter turn using your hand or the filter wrench. Do not overtighten, as this can damage the gasket.
Step 4: Adding Fresh New Oil
Now you’re ready to refill the engine with clean lubricant.
- Locate the oil fill cap on top of the engine. It is often brightly colored (yellow or orange) and may have an oil can symbol.
- Place your funnel securely in the fill hole.
- Slowly pour in the recommended type and amount of fresh oil. Check your owner’s manual for the exact capacity; do not rely on the dipstick reading yet. It’s better to add slightly less, check, then add more if needed.
- Periodically pause to allow the oil to settle in the crankcase.
- Once you’ve added most of the recommended amount, replace the oil fill cap.
Post-Change Checks And Procedures
The job isn’t complete until you’ve verified everything is working correctly. Skipping these steps could lead to engine damage.
Checking The Oil Level
You must check the oil level with the dipstick to ensure it’s perfect.
- Start the engine and let it run for about 30 seconds. This circulates the new oil and fills the new filter. Then turn the engine off.
- Wait a full minute for the oil to drain back into the crankcase.
- Remove the dipstick, wipe it clean with a rag, reinsert it fully, and then pull it out again to get an accurate reading.
- The oil level should be between the “Full” and “Add” marks on the dipstick. If it’s low, add small increments of oil, waiting a minute between checks, until the level is correct.
- Securely replace the dipstick.
Inspecting For Leaks And Cleanup
A final inspection ensures you have no leaks and keeps your workspace tidy.
- Look carefully around the oil drain plug and the new oil filter for any signs of dripping oil. Tighten slightly if you see a seep, but be cautious.
- Reconnect the spark plug wire you disconnected earlier.
- Properly dispose of the old oil and filter. Never pour used oil on the ground or into drains. Most auto parts stores and service centers accept used oil and filters for free recycling. Pour the old oil from your drain pan into the empty new oil jug for easy transport.
- Wipe down any spilled oil from the mower’s engine and frame.
Choosing The Right Oil And Filter
Using the correct lubricant and filter is as important as the change itself. The wrong type can affect performance and longevity.
Understanding Oil Viscosity And Types
Oil viscosity refers to its thickness. Your owner’s manual is the final authority.
- SAE 30: A common single-grade oil for warmer temperatures (above 40°F).
- 10W-30: A multi-grade oil suitable for a wider temperature range, including cooler spring/fall use.
- Synthetic or Synthetic Blend: These can offer better protection and longer intervals but check your manual for approval.
- Always look for oil marked with the API (American Petroleum Institute) service classification “SG” or higher for small engines.
Finding The Correct Oil Filter
The filter must match your engine’s specifications. Using the model number you recorded, you can find the right filter at any lawn equipment dealer, hardware store, or online retailer. Cross-reference brands like Fram, Bosch, or STP if needed.
Maintenance Schedule And Tips
Regular maintenance keeps your Craftsman running smoothly for years. Don’t wait for problems to appear.
Recommended Oil Change Frequency
A general rule is to change the oil every 50 hours of operation or at least once per mowing season. If you use your mower extensively, consider changing it more often, especially in dusty conditions. Always check the manual for the manufacturer’s specific recommendation for you’re model.
Additional Seasonal Maintenance
An oil change is a perfect time to perform other quick checks.
- Check and clean the air filter.
- Inspect the mower blades for sharpness and balance.
- Check the tire pressure.
- Grease any fittings if your model has them.
- At the end of the season, consider adding a fuel stabilizer if you store the mower with gas in the tank.
Frequently Asked Questions
Here are answers to common questions about changing oil in a Craftsman riding mower.
How Often Should I Change The Oil In My Craftsman Riding Mower?
You should change the oil at least once per mowing season. For most homeowners, following the 50-hour interval is a reliable schedule. If you mow very frequently or in demanding conditions, consider changing it more often, such as every 25-30 hours.
What Is The Best Oil For A Craftsman Riding Lawn Mower?
The best oil is the type and viscosity specified in your owner’s manual. For many Craftsman mowers with Briggs & Stratton or Kohler engines in typical conditions, SAE 30 or 10W-30 detergent oil with an API service classification of SG or higher is commonly recommended.
Can I Use A Car Oil Filter On My Lawn Mower?
No, you should not use an automotive oil filter on your lawn mower. The engines are designed differently, with different pressure requirements and filter specifications. Always use a filter made specifically for your mower’s engine model to ensure proper fit and filtration.
Where Can I Take My Used Lawn Mower Oil For Disposal?
Most automotive parts stores (like AutoZone, O’Reilly, Advance Auto Parts), many service stations, and some waste recycling centers accept used motor oil and filters for free. Call ahead to confirm their policy. Always transport the oil in a sealed, leak-proof container.
What Happens If I Overfill The Oil In My Mower?
Overfilling oil can be as harmful as having too little. Excess oil can cause foaming, which reduces lubrication and can lead to engine damage. It can also cause oil to leak into the air filter or be burned in the combustion chamber, creating excessive smoke. If you overfill, you must drain the excess to the proper level on the dipstick.