End-of-season mower and small-engine storage checklist

List your mower, trimmer, blower or tiller; your bot builds a fall storage checklist for each one and a spring parts list, built on university extension advice.

What it does

Most hard spring starts come from how the machine was put away in the fall. Kansas State University Extension's October 2026 advice is to start by disconnecting the spark plug wire or battery cable so the engine can't start by accident, then deal with the fuel: drain the tank, run the engine until it's out of gas, or use a gasoline stabilizer, because untreated gas turns thick and gummy. LSU AgCenter explains the choice. Running the engine dry prevents stale gas in the tank and varnish in the carburetor. The other option is to fill the tank with fresh gas plus stabilizer, which also keeps seals from drying out, but stabilizer only stops gas from going bad and can't fix gas that already has. Mix it into a gallon or more in a can so the ratio is right, and don't put leftover 2-stroke mix in a 4-stroke engine or a car. Next, change the oil and filter on 4-stroke engines (warm oil drains better). Check the spark plug and replace it if it's worn. Put a teaspoon or less of clean oil into the spark plug hole and turn the engine over a couple of times to coat the cylinder; more than that can damage the engine. Clean the cooling fins and check the air and fuel filters. K-State adds blade care (check for damage, clean, sharpen to the existing angle, and oil it instead of washing with water, which rusts it) and battery care (clean the terminals with a wire brush and store the battery somewhere protected, like a cool basement). Nebraska Extension suggests ordering spring parts now and tying a note to the machine so you remember what it needs. Your bot turns your list of machines into one checklist per machine with your owner's manual's numbers, and keeps a spring list. It works for one push mower or a landscaping crew's whole trailer.

Copy-paste prompt

Be my end-of-season small-engine storage helper, using Kansas State University Extension's lawnmower winterization tips, LSU AgCenter's "Preparing Small Engines for Storage" and Nebraska Extension's "Winterize Landscape Equipment" as background. My owner's manual comes first when it says something different.

My equipment: [e.g. "push mower, 4-stroke, Briggs engine; string trimmer, 2-stroke; leaf blower, 2-stroke; riding mower with battery"]. I'm [a homeowner / a landscaping or lawn crew with several units]. I store it in [a shed / garage / trailer].

1. For each machine, make a short checklist in this order:
- Safety first: spark plug wire or battery cable off before working on it.
- Fuel: run it dry, or fill the tank with fresh gas plus stabilizer. Remind me stabilizer can't fix old gas, to mix it in a can for the right ratio, and never to put 2-stroke mix in a 4-stroke engine or a car.
- Oil and filter (4-stroke only): change it while the engine's warm.
- Spark plug: check it and replace it if it's worn. A teaspoon or less of clean oil in the cylinder, then turn the engine over a couple of times.
- Clean the cooling fins and deck. Check the air filter and fuel filter.
- Blade: check for damage, clean, sharpen to the same angle (or take it to a shop), and oil it. No water.
- Battery: clean the terminals and store it somewhere protected and cool.
2. If I tell you a model number, remind me to look up the oil type, plug gap and torque in the manual instead of guessing.
3. Keep a spring list: parts to order (plugs, filters, blades), anything that seemed off, and where I put the battery.
4. For a crew: one row per unit (unit name, done / not done, parts needed) so I can hand it to whoever's closing out the trailer.
5. Add a calendar reminder for the week after my last mow, and one in late winter to order parts before spring.

Keep it short and practical. Don't recommend specific brands, and don't tell me to do anything the manual says not to.