How to Dispose of Old Lawn Mower: Gas & Electric Guide

Disposing of an end-of-life lawn mower requires more than dragging it to the curb. Gas-powered models contain combustible fuels and toxic oils, while modern electric mowers house high-voltage lithium-ion batteries that pose severe fire risks in standard garbage trucks. Improper disposal violates Environmental Protection Agency (EPA) regulations and leaves recoverable metals on the table. This guide provides exact, step-by-step protocols for dismantling, draining, and monetizing or recycling your old equipment.

The Disposal Decision Matrix: Repair, Part Out, or Scrap?

Before dismantling your mower, evaluate its financial viability. The right disposal method depends entirely on the machine's current mechanical state and the specific engine or battery platform it uses.

How to Dispose of Old Lawn Mower: Gas-Powered Models

Gas mowers (like older Honda HRX217 or Toro Recycler models) require strict fluid management before any recycling facility will accept them. Scrap yards will reject a mower that leaks oil or smells of raw gasoline, and municipal bulk-trash collectors will issue fines for hazardous material contamination.

Step 1: Safely Drain and Dispose of Fluids

1. Extract the Fuel: Use a manual siphon pump to transfer gasoline from the tank into an EPA-approved red fuel container. Never tip the mower to drain gas; this floods the carburetor and air filter, creating a massive spill risk. Dispose of the old fuel at your local municipal Household Hazardous Waste (HHW) facility. According to the EPA Household Hazardous Waste guidelines, pouring gasoline down drains or onto soil is a federal offense.
2. Drain the Engine Oil: Locate the oil drain plug (usually a 3/8-inch or 1/2-inch square drive) or use an oil extraction pump down the dipstick tube. Drain the oil into a catch pan. Most auto parts retailers (AutoZone, Advance Auto Parts) accept used motor oil for free recycling.
3. Remove the Spark Plug: Disconnect the spark plug wire and use a 5/8-inch or 13/16-inch spark plug socket to remove it entirely. This guarantees the engine cannot accidentally turn over while you are dismantling the blade or chassis.

Step 2: Dismantle for Maximum Scrap Value

If you take a whole mower to a scrap yard, it will be weighed as 'shredder feed' or 'light iron,' earning the lowest possible rate. To maximize your return, separate the metals.

• Steel (The Deck and Handle): The mower deck and handlebars are typically stamped steel. Expect to receive $0.05 to $0.10 per pound. A standard 21-inch push mower deck yields about 40-50 lbs of steel.
• Aluminum (The Engine Block): Most small engines (Briggs & Stratton, Kohler, Honda) use cast aluminum blocks. Aluminum pays significantly better, often $0.40 to $0.70 per pound. Unbolt the engine from the deck to claim this higher rate.
• Lead-Acid Batteries (Riding Mowers): If disposing of a riding tractor, remove the 12V lead-acid battery. Scrap yards pay a premium for lead, and many auto shops will give you a $10-$15 core credit toward a new battery.

How to Dispose of Old Lawn Mower: Battery & Electric Models

The rise of 56V and 80V electric platforms (EGO Power+, Ryobi, Greenworks) has changed the disposal landscape. While you don't have to deal with gasoline, the lithium-ion batteries require specialized handling.

The Lithium-Ion Battery Challenge

Never throw a lithium-ion mower battery in your household trash or standard recycling bin. If the battery casing is crushed in a garbage truck, it will trigger a thermal runaway event, causing intense chemical fires that are notoriously difficult to extinguish.

1. Tape the Terminals: Apply heavy-duty electrical tape or duct tape over the metal contact terminals on the battery to prevent short-circuiting.
2. Locate a Drop-Off: Use the Call2Recycle locator to find a certified battery drop-off point. Many Home Depot and Lowe's stores have dedicated lithium-ion battery recycling kiosks near their entrances.
3. Mail-In Programs: If the battery is swollen, punctured, or visibly damaged, drop-off kiosks will reject it. You must purchase a specialized hazmat mail-in kit from a service like Call2Recycle to ship it safely to a processing facility.

Harvesting the Electric Motor

Electric mower decks are mostly plastic and steel, but the drive motor contains highly valuable copper windings. If you have the time, use an angle grinder to cut open the motor housing and extract the copper wire. 'Bare bright' copper wire currently fetches over $3.00 per pound at most scrap yards, making it the most lucrative component of an electric mower.

Alternative Disposal Avenues

If dismantling and scrapping sound like too much labor, consider these turnkey alternatives:

Retailer Trade-In Programs

Major home improvement chains frequently run seasonal trade-in events, usually in early spring (March-April). You can bring in your dead gas or electric mower and receive a gift card (typically $50-$100) applicable toward a new model. The retailer then handles the bulk recycling and fluid disposal through their contracted waste management partners.

Donation to Vocational Schools

If your mower has a blown head gasket or a dead carburetor but is otherwise structurally sound, local high school agricultural programs or community college small-engine repair classes often accept them. Students use these 'junk' mowers to practice teardowns, diagnostics, and rebuilds. Call your local vocational center's auto-shop or ag-mechanics department to inquire.

Frequently Asked Questions

Can I just leave my old mower on the curb for bulk trash day?

In most municipalities, no. Bulk trash collectors will pick up the mower only if it is completely drained of all gasoline and oil, and the battery is removed. You must usually attach a signed tag certifying that the fluids have been properly drained. If the collector finds fluid leaks, they will leave it on the curb and issue a citation.

What should I do with the old mower blade?

Mower blades are high-carbon steel. If the blade is heavily nicked or bent, toss it in your scrap steel pile. If it still has life left, sharpen it using an angle grinder or file and sell it on local community boards—replacement blades for popular models like the Toro 22-inch Recycler frequently sell for $15-$20 used.

How do I dispose of a robotic lawn mower?

Robotic mowers (like Husqvarna Automower or Worx Landroid) contain complex PCBs, lithium batteries, and electric motors. Treat them as e-waste. Remove the battery for specialized recycling, and take the main unit to a municipal e-waste recycling center rather than a standard metal scrap yard, as the internal circuit boards contain trace precious metals that e-waste processors are equipped to harvest.