Learning how to change oil in Craftsman lawn mower is a fundamental skill for any homeowner. A Craftsman lawn mower oil change follows a specific procedure to keep its engine running smoothly. This routine maintenance task is simpler than you might think and is crucial for extending the life of your mower’s engine. By following the correct steps, you can save money on service calls and ensure your mower is ready for every cutting season.
How To Change Oil In Craftsman Lawn Mower
This guide provides a complete, step-by-step walkthrough for changing the oil in your Craftsman mower. We will cover everything from the tools you need to the final steps for disposing of the old oil properly. Whether you have a riding mower or a push model, the core principles are very similar. Let’s get started with what you’ll need to gather before you begin.
Tools And Materials You Will Need
Having the right tools on hand makes the job faster and cleaner. You likely have most of these items already in your garage or shed. Here is a checklist to run through before you start.
- Fresh Engine Oil: Check your owner’s manual for the correct type and quantity (typically SAE 30 or 10W-30 for warmer climates).
- New Oil Filter: If your Craftsman mower is equipped with a filter.
- An Oil Drain Pan: A shallow pan wide enough to catch the stream of oil.
- Socket Wrench Set or Adjustable Wrench: For removing the drain plug.
- Oil Filter Wrench: This is essential for gripping and turning the filter if one is present.
- Funnel: For pouring new oil without spills.
- Clean Rags or Paper Towels: For wiping up drips and checking the dipstick.
- Gloves: To keep your hands clean.
- Safety Glasses: To protect your eyes from any splashes.
Safety Precautions Before You Start
Your safety is the most important part of this project. Taking a few minutes to prepare your workspace and mower will prevent accidents and injuries. Never skip these critical steps.
Allow The Engine To Cool Completely
Always work on a cold engine. Hot oil can cause severe burns and the mower’s components will be too hot to handle safely. If you have just finished mowing, wait at least an hour for everything to cool down.
Disconnect The Spark Plug Wire
This is a non-negotiable safety step. Locate the spark plug wire and disconnect it from the plug. This ensures the engine cannot accidentally start while you are working on it, preventing serious injury from the rotating blade.
Work On A Level Surface
Park your mower on a flat, level surface like a driveway or garage floor. This ensures the oil drains completely and gives you a stable platform to work on. It also allows for an accurate oil level reading when you refill.
Step-By-Step Oil Change Procedure
Now that you are prepared, follow these steps in order for a successful oil change. The process is straightforward but paying attention to detail is key.
Step 1: Locate The Drain Plug And Oil Fill Tube
First, find the drain plug on the bottom of the mower’s engine deck. It is usually a hexagonal bolt. Also, locate the oil fill tube and dipstick on the top of the engine; you will need this later to refill. Consult your manual if you have trouble finding these components.
Step 2: Drain The Old Engine Oil
Place your drain pan directly under the drain plug. Using your wrench, carefully loosen and remove the drain plug. Allow all of the old, dirty oil to drain completely into the pan. This may take a few minutes. Once drained, clean the drain plug and its threads with a rag before reinstalling and tightening it securely.
Step 3: Replace The Oil Filter (If Equipped)
Many Craftsman riding mowers have an oil filter. If yours does, use the oil filter wrench to unscrew the old filter. Before installing the new one, apply a thin layer of clean oil to the rubber gasket on the top of the new filter. This creates a better seal. Screw the new filter on by hand until it is snug, then give it another quarter-turn with the wrench. Do not overtighten.
Step 4: Refill With Fresh Oil
Find the oil fill tube on the top of the engine. Insert your funnel and slowly pour in the recommended amount of fresh oil. It is best to start with slightly less than the full capacity. You will check the exact level in the next step to avoid overfilling, which can damage the engine.
Step 5: Check The Oil Level
After pouring, wait a minute for the oil to settle into the engine crankcase. Then, remove the dipstick, wipe it clean with a rag, reinsert it fully, and pull it out again to check the level. The oil should be between the “Full” and “Add” marks on the dipstick. Add small amounts of oil as needed until the level is correct.
Step 6: Reconnect The Spark Plug And Run The Engine
Once the oil level is perfect, reconnect the spark plug wire to the plug. Start the engine and let it run for about 30 seconds. This circulates the new oil throughout the engine. After shutting it off, wait another minute and check the oil level one final time, topping up if necessary. Also, look for any leaks around the drain plug or filter.
Disposing Of Used Oil And Filter
Never pour used motor oil on the ground, into a drain, or throw it in the trash. Used oil is highly toxic and contaminates the environment. Proper disposal is easy and often free.
- Pour the cooled, used oil from your drain pan into a clean, sealable container like the original oil bottle.
- Take the used oil and old filter to a recycling center. Most auto parts stores, service stations, and waste disposal facilities accept them at no charge.
Choosing The Right Oil For Your Craftsman Mower
Using the correct oil is as important as the change itself. The wrong type can lead to poor performance and engine wear. Your owner’s manual is the definitive source, but here are general guidelines.
- For warmer climates (above 40°F), SAE 30 is commonly recommended.
- For varying temperatures, a multi-viscosity oil like 10W-30 is often specified.
- Look for oil marked for “small engines” or “lawn mower use.” These often have additives beneficial for air-cooled engines.
- Always use a detergent oil classified as API service category SJ or later.
When To Change Your Lawn Mower Oil
Sticking to a schedule prevents sludge buildup and keeps your engine healthy. Don’t just rely on the mower’s performance as an indicator.
- First Change: After the first 5 hours of operation on a new mower (to remove break-in metal particles).
- Regular Changes: Every 25-50 hours of operation or at least once per mowing season, whichever comes first.
- If the oil appears very dark and dirty, or if you notice a burnt smell, change it immediately.
Common Mistakes To Avoid
Being aware of these common errors will help you complete the job correctly the first time and avoid potential damage to your mower.
Overfilling Or Underfilling The Oil
Too much oil can cause excessive pressure and lead to seal leaks or a smoking engine. Too little oil leads to inadequate lubrication and rapid engine wear. Always use the dipstick to get the level just right.
Not Changing The Oil Filter
If your mower has a filter, you must change it with every oil change. A clogged or old filter cannot effectively remove contaminants from the oil, making your fresh oil dirty quickly.
Using The Wrong Oil Type
As mentioned earlier, using automotive oil not suited for small engines or the wrong viscosity can affect performance in different temperatures and may not protect the engine properly.
Forgetting To Reconnect The Spark Plug
This mistake will leave you wondering why the mower won’t start after your maintenance. It’s an easy step to overlook, so make it part of your final checklist.
Troubleshooting Tips After An Oil Change
If something doesn’t seem right after your oil change, here are a few simple checks you can perform.
- Engine Won’t Start: Verify the spark plug wire is firmly reconnected. Check that you did not accidentally dislodge another wire.
- Oil Leak: Ensure the drain plug and oil filter are tightened securely. Check that the old filter’s gasket did not stick to the engine, causing a double-gasket leak.
- Smoking Engine: This often indicates overfilling. Check the oil level and drain a small amount if it is above the “Full” mark on the dipstick.
- Unusual Engine Noise: Stop the engine immediately. Check the oil level to ensure it is not critically low, indicating a possible leak or that not enough oil was added.
Frequently Asked Questions
How Often Should I Change The Oil In My Craftsman Riding Mower?
For Craftsman riding mowers, you should change the oil after the first 5 hours of use, and then every 50 hours of operation or once per season. Always refer to your specific model’s manual for the most accurate schedule, as some models may have different requirements.
Can I Use Synthetic Oil In My Craftsman Lawn Mower?
Yes, you can use synthetic oil in your Craftsman mower if it meets the viscosity and service classification specified in your owner’s manual. Synthetic oils often provide better protection in extreme temperatures and can extend the time between changes, but they are also more expensive.
Where Is The Oil Drain Plug On A Craftsman Push Mower?
On most Craftsman push mowers, the oil drain plug is located on the side or bottom of the engine crankcase. It is typically a square-head or hex-head plug. On some models, you may need to tip the mower on its side to access it; always tip it with the air filter and carburetor facing up to prevent oil and fuel from leaking into them.
What Is The Best Way To Change Oil In A Craftsman Lawn Mower Without A Drain Plug?
Some older or smaller mowers lack a drain plug. The best method is to use an oil extraction pump. Insert the pump’s tube into the oil fill tube and siphon the old oil out. Alternatively, you can carefully tip the mower on its side (air filter up) and pour the oil out through the fill tube into a pan. This method can be messier.
Do I Need To Change The Oil Filter Every Time?
Yes, if your Craftsman lawn mower is equipped with an oil filter, you should replace it with every single oil change. The filter traps debris and metal particles; a used filter is clogged and will not protect your engine effectively, rendering your new oil less useful right away.