How Do You Change Oil in Craftsman, Toro, Honda, Troy-Bilt, and Husqvarna Lawn Mowers?
Staring at your mower and dreading a messy oil change? I get it, but doing it yourself is straightforward and keeps more money in your pocket.
We will cover the exact tools to gather, simple steps that work across all these brands, and how to handle the old oil without a fuss.
I’ve done this job on my own Craftsman and Honda mowers for years, learning the tricks that prevent leaks and ensure a clean start every season.
What You’ll Need for Your Mower’s Oil Change
Gathering your gear is the first step to a smooth job. You probably have most of this in your garage already.
For tools, you’ll need a socket or wrench to fit your mower’s drain plug. A 3/8-inch drive ratchet with a short extension is my go-to. The plug itself is often a 3/4-inch or 1/2-inch socket size, but check your manual to be sure. You also need an oil drain pan (an old dishwashing tub works in a pinch), a funnel with a thin spout, and a pile of shop rags or paper towels.
For supplies, you need the right oil. Most small engines use SAE 30 for summer or 10W-30 for variable temperatures. Think of SAE 30 like thick honey; it’s great for steady heat but flows slowly when cold. 10W-30 is more versatile, like pancake syrup that pours easily. You’ll typically need about 18 to 24 ounces for a push mower, and up to 2 quarts for a riding mower. If your mower has a filter—common on riding mowers and some premium push models—get a new one. Make sure the oil matches your engine’s specifications.
You can buy oil and a filter separately, or look for a “lawn mower oil change kit” that bundles them. I often buy the kit for Max, my riding mower, because it’s convenient. The main point is, you have this. You don’t need to search for “lawn mower oil change near me” and pay someone else. With a half-hour and these items, you’re set, which is probably the easiest task in any lawn mower maintenance routine.
The One Universal Process for Changing Oil
Whether it’s a Craftsman, Toro, or a Husqvarna, the basic dance is identical for 95% of walk-behind and riding mowers. The brand changes where you put your tools, not the steps you take.
The Core 5-Step Sequence
Follow these steps in order for a clean, safe change every time.
- Run the Engine to Warm the Oil. Take your mower for a 5-minute spin to cut a few rows. Warm oil flows out like water, draining completely and taking suspended grit with it. Cold, sludgy oil leaves gunk behind.
- Disconnect the Spark Plug Wire (SAFETY FIRST). This is non-negotiable. Before you touch anything else, pull the wire off the spark plug. This ensures the engine cannot accidentally start while your hands are near the blade. Wrap the plug boot in a rag so it doesn’t accidentally touch metal.
- Locate and Remove the Drain Plug or Fill Tube. For most mowers, you’ll find a drain plug on the underside of the deck. Some models, like certain Hondas, let you tip the mower on its side and drain the oil out through the fill tube after removing the dipstick. Your manual is the final word here.
- Drain the Old Oil. Position your drain pan, remove the plug or cap, and let it flow. On a riding mower, you might need to tilt the deck slightly to get the last bit out. Give it a full 5 minutes. Patience here means a cleaner engine.
- Refill with New Oil to the Proper Level. Replace the drain plug or right the mower. Use your funnel and slowly pour in about ¾ of the recommended oil amount. Wait a minute for it to settle in the crankcase, then check the dipstick. Add more in small increments until the oil level is at the “Full” mark. Overfilling is just as bad as running it low, so take your time.
Wipe the dipstick clean each time you check. That final dipstick check is your guarantee of a job done right. The exact steps for how do you change oil on a lawn mower are almost always the same; the differences are in the little details like plug location or whether you can tip it. Once you do this once, you’ll see it’s simpler than fixing a clog on Sunny, my drip line.
When to Change Your Mower’s Oil: Season or Hours?
Do it in the fall. That’s the short answer. Letting old, dirty oil sit in your mower’s engine all winter is asking for trouble. That used oil is full of combustion byproducts and acids that can slowly corrode engine parts from the inside while it sits idle for months.
Changing the oil in the fall gives you a clean, fresh start for spring and protects your engine during its long nap. It’s one less chore to worry about when the grass starts growing and you just want to get Max out and mowing.
Manual Says 50 Hours, You Say Once a Year
Your owner’s manual isn’t wrong. It recommends an oil change every 50 hours for a reason-that’s the engine’s ideal maintenance schedule. But let’s translate that to real life. For a typical homeowner with a quarter to a half-acre lot, you’re probably mowing for about an hour each week during the growing season.
That adds up fast. Over a 30-week season, you’re at 30 hours. If you have a bigger yard, or if you’re like me and sometimes mow just for the zen of it, hitting 50 hours in a single season is very common.
For most of us, the “once per season” rule and the “every 50 hours” rule end up being the same thing. You’re essentially following the manual’s advice by doing it annually in the fall.
When One Change Isn’t Enough
Think about how you use your mower. Is it a quick weekly trim, or are you running a small landscaping business from your garage? Your usage dictates your maintenance schedule.
Here’s a simple way to think about it:
| Your Mower’s Job | Best Oil Change Strategy |
|---|---|
| Standard residential lawn (under 1 acre) | Once a year, in the fall. |
| Large property, frequent mowing, or pulling a sweeper/dethatcher | Once in the fall, and check hours mid-summer. Change if you’ve blown past 50. |
| New engine (first 5-10 hours) | Change after the break-in period, then follow the schedule above. |
I stick to the fall change for my own lawn. But I have a neighbor with a few acres who gives his zero-turn a mid-season refresh because by July, he’s already put 60 hours on it. His engine runs quieter and smoother for the second half of the year because of it.
Listen to your mower and be honest about its workload; if you run it hard, clean oil is the cheapest insurance you can buy.
Brand-Specific Tips and Quirks
The universal steps get you 90% of the way. This part is about that last 10%, where your specific machine might throw you a curveball. Think of it like knowing the little squeak in Max’s deck lift or the exact spot Patch always shows up. It saves time and frustration.
How to Change Oil in a Honda Mower
Honda engines are built like a precision watch. They often reward your maintenance with a dedicated drain port that’s easy to find and access, usually just a simple bolt on the side of the engine block. The most important tip for a Honda is to use the exact oil type called for in your manual, which is very often SAE 10W-30. Don’t just pour in whatever’s left in the garage.
Some older or smaller Honda push mower models give you two choices: use the drain plug or tip the mower to drain the oil out the fill tube. I always use the plug. It’s cleaner, you get more old oil out, and you avoid the risk of fuel or debris from the carburetor spilling where it shouldn’t. The plug is the professional’s choice.
How to Change Oil in a Toro Mower
Many Toro push mowers, especially older ones, are designed for the “tilt and drain” method. You won’t find a traditional drain plug. Instead, you carefully tip the mower on its side so the fill tube is at the lowest point, and the oil drains right out of it.
The key to a clean Toro oil change is securing the tilt so the mower doesn’t slip and make a mess. Use a sturdy block of wood under the lower edge, or better yet, have a helper hold it steady. Have your drain pan ready and move slowly. The oil will come out in a steady stream. This careful approach helps when you’re fixing a surging or flooded lawn mower engine.
People always ask: should you do a Toro lawn mower oil change before or after winter? The answer is firm. Always do it before storage in the fall. Fresh oil sits in the engine all winter, protecting internal parts from corrosion. Storing it with old, acidic oil in the crankcase is asking for trouble, especially when you store or transport your lawn mower for winter.
How to Change Oil in a Craftsman or Troy-Bilt Mower
We’re grouping these because they frequently share the same heart: a Briggs & Stratton engine. The steps are very similar. For their riding mowers, the trick is navigation. If you’re looking to start a Briggs & Stratton lawn mower, a quick pre-start check helps. The following steps cover the routine startup.
On a Craftsman or Troy-Bilt rider, the drain plug is rarely right under the engine; it’s often on a tube that routes the oil down near the rear axle. You’ll need to slide a long, shallow drain pan way back under the machine. A baking sheet or disposable aluminum pan works great here.
If your model has an oil filter, its location is your other key task. It’s usually a canister-type filter screwed onto the engine block, and it’s meant to be hand-tightened. Get the old oil drained first, then unscrew the old filter. Smear a little new oil on the rubber gasket of the new one before you screw it on by hand until it’s snug. No wrenches needed.
How to Change Oil in a Husqvarna Mower
Husqvarna riding mowers often feature a brilliant piece of homeowner-friendly design: a built-in drain valve. Instead of a plug, you’ll find a small, yellow, hand-turn valve at the end of a hose near the bottom of the engine. This makes it easy to start and operate your Husqvarna lawn mower with minimal hassle.
Place your drain pan, turn the valve, and the oil drains neatly with zero tools and almost zero mess. After you refill with new oil, run the engine for just a minute, then shut it off and double-check that this handy valve isn’t weeping or leaking. It’s rare, but a quick visual check ensures your clever system stays clean.
This same principle applies if you’re searching for info on a “Spartan mower oil change kit” or a “Mountfield mower oil change.” Brands change, but the engine’s needs don’t. Find the drain point (plug, valve, or tube), use the oil your manual specifies, and you’re golden.
After the Oil Change: Check, Clean, Dispose
You have fresh oil in the crankcase. Your job is not done yet. I learned this the hard way with Max, my zero-turn. Rushing through the finish led to a greasy mess on my deck and a headache later. Follow these three simple steps to wrap up right.
First, fire up the engine. Let it run for about a minute. Listen for that smooth, steady hum-it means the new oil is circulating. Then, turn it off. After the engine cools for a minute, re-check the oil level on the dipstick to ensure it’s perfect. Wipe the dipstick clean, push it all the way in, and pull it out again. The oil should sit snugly between the two marks. If it’s low, add a touch more. Too much oil can cause foam and damage, just like too little.
Now, look for spills. Even a small drip on the mower deck can become a problem. Clean any spilled oil immediately to prevent dark, stubborn grass stains on your lawn. I keep an old towel and a bottle of soapy water near Sunny, my irrigation setup. A quick scrub removes the oil. If you mow with oil on the deck, it sprays onto the grass, leaving ugly brown patches that take weeks to recover.
Finally, handle the old oil. Carefully pour the used oil from your drain pan back into the empty, new oil jug, seal it tightly, and take it to an auto parts store or recycling center. Most accept it for free. Never pour it on the ground, down a drain, or into the trash. Used oil can poison soil and water, harming the pollinators we want to protect. It’s a small act that shows respect for your yard and your neighborhood.
What if Things Don’t Go as Planned?
You’re ready. You’ve got your pan, your new oil, and you slide under the deck. You fit your wrench on the drain plug and… it won’t budge. I’ve been there with Max more than once. Don’t force it and strip the bolt head, that’s a whole new problem.
For a stuck drain plug, the right tool and a little patience make all the difference. First, always use a proper six-point socket, not an open-ended wrench. The socket grips the entire bolt head, distributing force evenly so you’re less likely to round it off. Apply steady, firm pressure. If it’s really frozen, a shot of penetrating oil like Liquid Wrench around the threads can work wonders. Let it soak for ten minutes, then try again. If you still can’t get it, sometimes warming the area around the plug briefly with a hairdryer can help break the seal.
What Happens if I Put Too Much Oil?
It’s an easy mistake. You pour from the quart bottle, it glugs out fast, and suddenly you’re past the “full” line. I’ve done it. The mower will tell you something’s wrong.
An overfilled engine can’t work right. The crankshaft whips through the excess oil, causing it to foam and aerate. This foam doesn’t lubricate. You might see blue smoke from the exhaust, or the engine will be hard to start and run rough. Left alone, that pressure can blow seals and cause serious damage.
If you overfill, don’t start the engine. You need to remove the excess, and a simple turkey baster is your best friend here. Wipe off the dipstick tube, insert the baster, and draw the oil out into a container. You can also use a handheld fluid suction pump. Go slow, check the dipstick after each pull, and stop when you’re back in the safe zone.
How Do I Know How Much Oil to Put In?
Ignore the bottle. Seriously. The listed capacity on the bottle or in your manual is a guideline. The dipstick is the law. Oil capacity can change with how you tilted the mower, the temperature, or even the last time it was drained. It’s essential to know the type and capacity of the oil required for your specific mower.
Here’s the method I use every time. After draining and replacing the plug, I add about three-quarters of the recommended amount. I then wait a full minute for it to settle into the crankcase. I wipe the dipstick clean, insert it fully, and pull it to check. The dipstick never lies.
Add new oil in small amounts, checking the dipstick after each addition until you reach the “full” mark. This is not a race. It’s the surest way to hit the perfect level and avoid the overfill headache entirely. Your mower’s engine will thank you with smoother starts and longer life.
Your Quick-Answer Oil Change FAQ
Should I change the mower oil at the beginning or end of the season?
Do it at the end, right before you store it for winter. Fresh oil protects the engine from corrosion all season long, so it’s ready for a greedy start next spring.
Are those lawn mower oil change kits actually worth buying?
Absolutely, especially for riding mowers. They bundle the exact oil and filter you need, saving you a trip and the hassle of guessing-more time for perfect stripes.
I saw a mower oil change kit at Bunnings. Is that a good grab?
Yes, stores like Bunnings are perfect for this. Just match the kit’s oil type and filter number to your mower’s manual to ensure a perfect fit.
Why is my Honda mower’s manual so picky about the oil type?
Honda engines are precision-built. Using their recommended oil (like 10W-30) ensures optimal performance and longevity, protecting your investment for seasons of thick, healthy grass.
I have a Spartan rider. Is changing its oil any different?
The core process is the same as other riders: drain, replace filter, refill. Always check your Spartan’s manual for the specific drain plug location and oil capacity to avoid any guesswork.
Keeping Your Mower and Lawn in Top Shape
Make oil changes a regular part of your lawn care calendar, just like filling up the gas. This simple habit keeps your mower’s engine running smoothly, so it can give your grass a clean, even cut every time. Also, it’s important to change oil frequency regularly for your mower, since oil-change frequency varies by model and use. Check the owner’s manual for the recommended interval.
Always recycle your used oil at a proper facility to protect the soil, your pets, and pollinators. I find that staying curious and adapting your routine each year, much like learning from Patch’s quirks, makes for a healthier, happier yard.
Expert Resources and Citations
- How do I check and change lawn mower oil?
- How to Change the Oil in a Lawn Mower Engine
- How to Change Oil in Lawnmower Engines of Every Type – Lawn Chick
- How to Change Oil in Your Lawn Mower | ACE Tips & Advice
- Shop Tires, Auto Services, and Wheels Online | Big O Tires
Written by Ria Carrington. Ria is an avid lawn care enthusiast and advisor. No lawn is unsalvagable when Ria is at work. She has helped countless homeowners breath new life into their dying lawns. She has a B.Sc in Agriculture and brings practical advice combined with knowledge of plant science and her decade worth of hands on experience.