Learning how to change oil Craftsman lawn mower is a fundamental skill for any homeowner. To change the oil in a Craftsman mower, you’ll need a drain pan and a fresh filter. This routine maintenance is crucial for keeping your engine running smoothly and extending the life of your machine. It’s a simple process that takes less than an hour and can save you significant money on repair bills.
This guide provides clear, step-by-step instructions for various Craftsman models. We will cover the tools you need, safety precautions, and detailed steps for both draining and refilling. By the end, you’ll have the confidence to perform this essential task yourself.
How To Change Oil Craftsman Lawn Mower
Changing the oil in your Craftsman lawn mower is a straightforward DIY project. The core steps are universal: warm up the engine, drain the old oil, replace the filter if your model has one, and refill with fresh oil. However, the exact method can vary slightly depending on whether your mower has a drain plug or a siphon tube. This section outlines the general procedure that applies to most Craftsman walk-behind and riding mowers.
Always refer to your owner’s manual for the most accurate specifications for your specific model, including oil type, capacity, and any unique steps. If you’ve lost your manual, you can often find it online by searching your mower’s model number, which is typically located on a decal under the seat or on the frame.
Tools And Materials You Will Need
Gathering the right tools before you start makes the job faster and cleaner. You likely already have most of these items in your garage.
- A drain pan or old container (at least 2-quart capacity)
- Fresh engine oil (check your manual for the correct type and grade, often SAE 30 or 10W-30)
- A new oil filter (if your Craftsman mower is equipped with one)
- A funnel
- Clean rags or paper towels
- Socket wrench or adjustable wrench
- Gloves to keep your hands clean
- Safety glasses
Important Safety Precautions
Your safety is the top priority. Never overlook these critical steps before beginning any maintenance on your lawn mower.
- Allow the engine to cool slightly if it has been running, but perform the oil change while the engine is still warm. Warm oil flows out more easily, carrying more contaminants with it.
- Disconnect the spark plug wire. This is the most important step to prevent the engine from accidentally starting while you are working on it. Secure the wire away from the spark plug.
- Work on a flat, level surface to ensure all the old oil drains out completely and to prevent the mower from tipping.
- Have a plan for disposing of the used oil and filter properly. Most auto parts stores and recycling centers accept used oil for free. Never pour it on the ground or into a drain.
Locating Your Model Number
To get the correct oil filter and oil type, you need to know your mower’s model number. For Craftsman mowers, this is usually found on a sticker or metal plate. On riding mowers, check under the seat, on the frame near the rear wheels, or on the side of the engine cowl. For walk-behind mowers, look on the deck, often near the discharge chute or on the rear of the deck. Write this number down for reference when purchasing supplies.
Step-By-Step Oil Change Procedure
Now, let’s walk through the process. Follow these steps in order for a successful oil change.
Step 1: Warm Up And Prepare The Engine
Start your mower and let it run for 5-10 minutes. This warms the oil, making it less viscous so it drains fully. After warming, turn off the engine and disconnect the spark plug wire as described in the safety section. Place your drain pan underneath the drain valve or oil fill tube, depending on your mower’s design.
Step 2: Drain The Old Engine Oil
There are two common methods for draining oil on Craftsman mowers.
- Drain Plug Method: Locate the drain plug on the bottom or side of the engine crankcase. Use your wrench to carefully loosen and remove the plug. Allow all the oil to flow into the drain pan. Once drained, clean the plug and its threads with a rag and reinstall it, tightening it securely but do not overtighten.
- Siphon/Pump Method: Many newer Craftsman mowers lack a drain plug. Instead, you drain the oil through the dipstick tube. You may need a special siphon pump or you can use the “tip and drain” method. To tip the mower, ensure the fuel tank is nearly empty and the air filter is facing up. Tip the mower on its side so the dipstick tube is facing downward over your drain pan. The oil will pour out. Be extreamly careful not to tip it so far that fuel or oil runs into the air filter or carburetor.
Step 3: Replace The Oil Filter (If Applicable)
If your Craftsman riding mower has an oil filter, this is the time to change it. Locate the filter on the side of the engine block. Place your drain pan underneath it, as some oil will spill out. Use an oil filter wrench to turn the old filter counterclockwise to remove it. Before installing the new filter, dip your finger in clean new oil and smear a light coat on the rubber gasket of the new filter. This ensures a good seal. 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 tightening, as this can damage the gasket.
Step 4: Refill With Fresh Oil
Using your funnel, pour the recommended type and amount of fresh oil into the oil fill tube. Do not pour in the entire amount listed in the manual at once. Start with about ¾ of the recommended capacity. For example, if your mower holds 48 ounces, start with 36 ounces.
Wait a minute for the oil to settle into the crankcase, then check the dipstick. Wipe it clean, reinsert it fully, and pull it out again to check the level. Add small amounts of oil, checking the dipstick after each addition, until the oil level reaches the “Full” mark on the dipstick. It’s crucial not to overfill, as this can cause engine damage.
Step 5: Final Checks And Cleanup
Once the oil is at the correct level, securely replace the oil fill cap or dipstick. Reconnect the spark plug wire to the spark plug. Start the engine and let it run for about 30 seconds. This circulates the new oil and allows you to check for any leaks around the drain plug or new oil filter. Turn off the engine and wait another minute, then check the dipstick one final time to ensure the level is still correct. Top up if necessary.
Finally, clean up any spilled oil from the mower deck or engine. Properly dispose of the used oil and old filter at a designated collection site.
Choosing The Right Oil For Your Craftsman Mower
Using the correct oil is as important as changing it. The wrong oil can lead to poor performance and increased wear.
- Oil Type: Most Craftsman mower engines use a detergent oil classified as SJ or higher. Common grades are SAE 30 (for consistent temperatures above 40°F) or 10W-30 (for a wider temperature range). Some newer models may recommend synthetic blend or full synthetic oil.
- Oil Capacity: This varies widely. A typical walk-behind mower holds about 18-20 ounces. A riding mower may hold 48 ounces (1.5 quarts) or more, especially if it has an oil filter. Always verify capacity in your manual.
- Brand: While brand is less critical than specification, using a reputable brand from an automotive or lawn care store is recommended.
Common Mistakes To Avoid
Being aware of these common errors will help you complete the job correctly the first time.
- Overfilling or Underfilling: Both are harmful. Overfilling can cause oil to foam and not lubricate properly, while underfilling leads to excessive wear and overheating.
- Forgetting To Reconnect The Spark Plug: This is a simple but frustrating oversight that will prevent your mower from starting after the oil change.
- Using The Wrong Oil Filter: An ill-fitting filter can leak or not filter properly. Always match the filter number to your engine model.
- Overtightening The Drain Plug Or Filter: This can strip threads or crush gaskets, leading to leaks. Hand-tight plus a slight turn with a wrench is usually sufficient for the plug, and hand-tight plus three-quarters turn for the filter.
- Improper Disposal: Used oil is a pollutant. Always take it to a recycling center.
When To Change Your Mower’s Oil
Sticking to a schedule is key. A good rule of thumb is to change the oil at least once per mowing season. For newer mowers, consider the first oil change after the first 5-8 hours of operation to remove initial break-in metal particles. After that, follow the manual’s interval, which is often every 25-50 hours of use or annually, whichever comes first. If you use your mower heavily or in dusty conditions, more frequent changes are a good idea.
FAQ Section
Here are answers to some frequently asked questions about changing oil in a Craftsman lawn mower.
How Often Should I Change The Oil In My Craftsman Riding Mower?
For most Craftsman riding mowers, you should change the oil every 50 hours of operation or at least once per season. Always check your specific owner’s manual for the manufacturer’s recommended interval, as it can vary by engine model.
Can I Use Car Oil In My Lawn Mower?
Maybe, but it’s not always recommended. Many car oils have additives that can harm small engines. It is safer to use an oil labeled for small engines or lawn mowers, which meets the specifications (like SAE 30 or 10W-30) outlined in your Craftsman manual.
Where Is The Drain Plug On A Craftsman Lawn Mower?
The location varies. On many walk-behind models, the drain plug is on the side or bottom of the engine crankcase. On some riding mowers, it may be on the side of the engine block. If you cannot find a plug, your model likely uses the siphon/tip method through the dipstick tube. Consulting your manual is the best way to locate it.
What Is The Best Way To Change Oil In A Craftsman Mower Without A Drain Plug?
The most effective method is to use a fluid extractor or siphon pump inserted down the dipstick tube to pull the oil out. Alternatively, you can carefully tip the mower on its side (air filter up) to pour the oil out through the fill tube into a pan. Ensure the fuel tank is nearly empty before tipping to avoid fuel leaks.
How Do You Reset The Oil Change Light On A Craftsman Mower?
Some Craftsman riding mowers with electronic dashboards have an oil change reminder. The reset procedure varies. Often, you turn the ignition key to the “on” position without starting the engine, then press and hold a button or follow a sequence outlined in your manual. If you don’t have the manual, searching online for your model number and “oil light reset” should provide instructions.