Spring Startup Checklist for Riding Mowers

A few minutes of prep before the first mow of the season prevents most of the "won't start" calls we see at the counter. Run through this checklist before you pull the cord or turn the key.

1. Fresh fuel

Gasoline left over winter loses volatility and can gum up carburetors. If the tank still has last season's fuel, drain it and refill with fresh gas (ethanol-free if your equipment calls for it).

2. Check the oil

Pull the dipstick. Oil should be at the fill line and amber/light brown — not black or milky (milky oil suggests water intrusion and needs attention before you run the engine).

3. Inspect the air filter

A season of storage is enough time for a paper or foam filter to collect dust and debris. Tap out or replace before startup — see our air filter cross-reference guide.

4. Look at the spark plug

Pull the plug and check the gap and electrode condition. A plug that's carbon-fouled or worn rounds off starting reliability fast. See our spark plug cross-reference guide for common replacements.

5. Battery and connections

On riding mowers, clean any corrosion off the battery terminals and confirm a full charge before the first start — a winter of sitting idle is hard on lead-acid batteries.

6. Tire pressure and deck belt

Check tire pressure against the sidewall spec and give the deck belt a visual once-over for cracking or glazing. See our deck belt guide if it needs replacing.

Still won't start after all that? Open the Service tab and describe the symptoms — the AI will walk through diagnostics with you, or you can escalate to a live technician.