Regular oil changes are essential maintenance for keeping your Toro lawn mower running smoothly and extending its engine life. Draining and replacing the engine oil removes dirt, debris, and contaminants that accumulate during operation. Whether you own a walk-behind push mower or a riding mower, the basic process is similar, though the location of the drain plug or drain method may vary. This guide walks you through the entire process, from preparation through disposal of the old oil.
Preparing Your Toro Mower for an Oil Drain
Before you begin draining oil, take time to prepare your workspace and gather the necessary tools and materials. Proper preparation ensures a safer, cleaner process and prevents spills.
Why warm the engine first? Running the engine for a minute or two before draining warms the oil slightly, making it thinner and more likely to flow freely from the drain area. Warm oil also carries more suspended particles and debris, so draining warm oil removes more contaminants than cold oil. However, allow the engine to cool for a few minutes after shutting it off—the oil should be warm but not so hot that it burns you.
Tools and materials you’ll need: Gather an oil drain pan (at least 2-3 quarts capacity for most Toro models), adjustable wrenches or sockets sized to fit your drain plug, a socket wrench set, an oil filter wrench if your model has an oil filter, fresh engine oil in the recommended grade and quantity, oil absorbent material or rags, and a spark plug wire disconnect tool or gloved hand (for safety). Check your mower’s owner manual to confirm the oil capacity and recommended viscosity.
Safety first—disconnect the spark plug wire. Before working under or around the mower, always disconnect the spark plug wire to prevent accidental engine start. This is a critical safety step. Simply grasp the wire boot (not the wire itself) and pull it free from the spark plug. If you cannot easily reach the spark plug from above, you may need to tip the mower carefully—but note that tipping direction matters. For walk-behind mowers with a vertical crankshaft, tip toward the air filter and away from the carburetor to avoid oil entering the carburetor. Check your manual for safe tipping angle.
Place your drain pan in a convenient location, spread absorbent material around your work area to catch drips, and ensure you have good lighting.
Locating the Drain Plug or Drain Method on Your Toro
The location and method for draining oil depends on your specific Toro model. Walk-behind mowers and riding mowers often differ in design and drain setup.
Walk-behind Toro mowers typically have one of two configurations. Many models feature a drain plug located on the underside of the engine crankcase, often accessible from below the mower deck or near the rear of the mower housing. To access it, you may need to tip the mower carefully on its side or stand it on a ramp. Other walk-behind models do not have a drain plug; instead, you must tip the mower at a specific angle to allow the oil to flow into a pan, then use a dipstick tube or siphon pump to extract the remaining oil. Consult your owner’s manual to identify which type your mower is.
Riding Toro mowers typically have a drain plug that is more easily accessible, often located beneath the engine on the underside of the hood area. The drain plug is usually a bolt that can be removed with a wrench. Riding mowers are designed to make this process easier since owners perform oil changes regularly.
No drain plug? If your Toro lacks a drain plug, you have two options. First, you can carefully tip the mower (following the manual’s guidance on safe angle and direction) and drain the oil into a pan. Second, you can use a hand-operated siphon pump designed for oil extraction. A siphon pump works by inserting a tube down the dipstick hole and using a hand lever to draw oil up and into a collection container. This method is less messy and avoids tipping the mower.
Consult your owner’s manual or check the Toro website for your specific model number to confirm the drain method before you begin.
Draining the Old Oil Step by Step
Once you’ve located the drain point, the actual draining process is straightforward.
Removing the drain plug: Position your drain pan directly beneath the plug. Using the appropriate wrench or socket, slowly loosen the plug by turning it counterclockwise. Once loose enough to turn by hand, carefully unscrew it the rest of the way by hand, keeping your fingers clear of the oil flow. If the oil is still quite warm, wear gloves to protect your hands. Let the plug hang near the mower or set it aside on a clean surface where you won’t lose it.
Allow full drainage: Once the plug is removed, the oil will begin flowing into the pan. Give it time—at least 5 to 10 minutes—to drain as much oil as possible. You can gently tilt the mower (if safe to do so) to encourage the last bit of oil to flow toward the drain opening. The flow will eventually slow to a trickle, and that’s normal. Do not rush this step; thorough draining ensures you remove as much old oil and contaminants as possible.
If oil is not draining: If oil doesn’t flow after you’ve removed the plug, the plug hole may be partially clogged. Turn off the engine completely (if you warmed it earlier), and check whether debris is blocking the hole. You can carefully clear a minor blockage with a small wire or pin, or you can use compressed air to gently blow out the hole. If the drain is severely blocked, you may need to consult your manual or contact Toro support.
Inspect the plug and opening: Before reinstalling the plug, wipe it clean with a rag and inspect it for damage, cracks, or stripped threads. If the plug appears damaged, replace it. The drain hole opening should also be clean and free of debris.
Refilling and Disposing of the Oil
After the oil has finished draining, it’s time to refill your mower and dispose of the old oil responsibly.
Reinstall the drain plug: Carefully thread the drain plug back into the opening by hand first to avoid cross-threading. Once hand-tight, use your wrench to snug it firmly, but do not over-tighten. Over-tightening can strip the threads or crack the plug. A firm, snug connection is sufficient.
Add fresh engine oil: Consult your owner’s manual for the correct oil type (usually SAE 30 for older models or 10W-30 for year-round use on newer models) and the total capacity (typically 0.5 to 1.5 quarts for walk-behind mowers, more for riding mowers). Pour the new oil slowly through the fill opening, which is often covered by a twist-off cap. Stop periodically to check the oil level with the dipstick, if your mower has one.
Checking the oil level: Replace the dipstick cap, wait a moment, then remove the dipstick again and wipe it clean. Reinsert it fully, remove it again, and check where the oil level reaches. It should be between the minimum and maximum marks on the dipstick. If too low, add a small amount of oil and recheck. If overfilled, you may need to remove a small amount using a siphon.
Proper disposal of used oil: Never pour used engine oil down the drain, into soil, or into trash. Used oil is hazardous and contaminates water and soil. Instead, store the old oil in a sealed container or the drain pan and take it to a recycling center, oil collection event, or participating quick-lube service. Many municipal hazardous waste facilities accept used oil free of charge. Some retailers that sell engine oil also accept used oil for recycling. Check your local regulations and find a nearby disposal location before draining the oil.
Once you’ve added fresh oil and confirmed the level is correct, reconnect the spark plug wire, start the engine briefly to circulate the new oil, and check for any leaks around the drain plug. If everything looks dry, you’ve successfully completed an oil change on your Toro lawn mower.
