Spring Tune-Up Checklist for Your Lawn Mower After Winter Storage
Minnesota winters are hard on equipment. A few checks before your first cut can save you from a breakdown mid-season — and expensive repairs that could have been avoided.
Why Spring Start-Up Matters
A mower that sat in a cold garage all winter is not the same machine that went in last fall. Fuel goes stale, belts crack, oil settles, and battery charge drains. Running a mower that has not been properly started up for the season stresses components and often turns a $20 filter into a $200 repair.
Check the Oil and Air Filter First
Old oil thickens over winter and loses its protective properties. Change it before the first cut — a fresh quart of the right viscosity oil is cheap insurance. While you have the hood up, pull the air filter. If it is gray, oily, or torn, replace it. A clogged air filter makes the engine run rich, which can foul the spark plug and cause rough starting.
Inspect the Blade, Belt, and Fuel System
Spin the blade by hand with the engine off — if you feel grinding or wobbling, the spindle bearings may need attention. Look for cracks in the deck belt; a frayed or glazed belt will slip under load. Drain any fuel left from last fall and start with fresh gas. Ethanol-blend fuel that sat more than 30 days can varnish the carburetor jets and cause hard starting or stalling.
Battery and Safety Switches
Charge the battery with a trickle charger before expecting it to start the engine. A battery that reads 12 volts at rest may drop under 9 volts under load — that will prevent starting. Also check the seat safety switch and brake interlock. These switches often corrode over winter and can prevent the engine from cranking or the blades from engaging.
When to Bring It In
If you work through this list and the mower still will not start cleanly, stalls under load, or smokes on start-up, it is time for a professional diagnosis. We see dozens of mowers each spring with problems that could have been caught in 20 minutes during fall storage prep. Catching them in spring is the next best thing.
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