How to Clean a Lawn Mower Air Filter (9 Filters Tested)
Wash foam filters in warm soapy water, dry fully, then re-oil. Never wash paper. Includes a safe-vs-unsafe cleaner table and the light-box replace test.
Maintenance & Care Editor
Sam Rourke
Sam Rourke is the maintenance & care editor at Mower Mentor. Sam covers the routine, preventive side of mower ownership: oil changes, blade sharpening and balancing, air-filter and spark-plug tune-ups, deck cleaning, fuel care, winterizing and spring start-up, and the by-the-hours maintenance schedules that tie it all together. Sam came to this work through fifteen years of small-engine service, holds Equipment & Engine Training Council (EETC) certification, and has run a Briggs & Stratton and Honda GCV service bench long enough to know which maintenance steps actually matter and which are dealership upsells. Every procedure on the site is one Sam has done on a real machine, photographed step by step, with the torque values and part numbers that the manual buries. Sam's own fleet - a gas walk-behind, a battery mower, and an aging riding mower - is the documented test bed for the maintenance calendar. Sam lives in the US Great Lakes region.
At a glance
- Guides published
- 68
- Newest guide
- August 4, 2026
Guides by Sam · Page 2
Showing 16–30 of 68 guides, newest first
How to Remove a Stuck Lawn Mower Spark Plug (Don't Snap It)
Soak the threads 30 minutes, then rock it loose with a 6-point socket. The full escalation ladder, plus extractor and Heli-Coil fixes if it snapped.
Fix a Lawn Mower Spark Plug Wire (2 Ways, 6 Tested)
Crimp a new terminal onto a torn lawn mower spark plug wire for about $4, or replace the coil when the wire is cracked. Decision table, steps, air-gap spec.
How to Change a Lawn Mower Spark Plug (9 Mowers Tested)
Change a lawn mower spark plug in 8 steps: 5/8 or 13/16 socket, gap it to your engine spec (the box's 0.035 is wrong), 3/8 turn past seated.
Lawn Mower Air Filter Cover Replacement (11 Covers Tested)
Match your air cleaner cover to your engine number, not your mower badge. Briggs, Honda, Kohler and Toro part numbers, plus the fix for a cover that falls off.
Lawn Mower Air Filter Replacement: Not Universal (2026)
Match your air filter to the engine number, not the mower brand. Cross-reference table, size chart and 40 filters measured on calipers.
Lawn Mower Air Filter Full of Gas? (Don't Start It)
Stop - don't start a mower with gas in the air filter. The carb float is overflowing. Check the oil for fuel, swap the filter, fix the needle and seat.
Small Engine Tune-Up in a Can: What It Fixes (and Doesn't)
Tested B'laster's tune-up spray on 6 stored machines against a real oil, filter and plug service. See what the can fixes in 22 minutes, and what it can't.
Lawn Mower Tune-Up in 6 Steps (Tested on 9 Mowers)
Tune up any gas mower in 6 steps - fuel, oil, air filter, plug, blade, deck. Push vs riding, DIY vs shop costs, and a printable checklist.
How to Clean a Husqvarna Air Filter (Don't Wash the Paper)
Clean your Husqvarna air filter the right way: tap the paper, wash the foam, and skip the oil on dual-stage. Locator by body style, plus replace-now signs.
How to Change a Husqvarna Spark Plug (V-Twins Take Two)
Change a Husqvarna spark plug in 15 minutes: find it by body style, gap it to your engine spec, torque it right. V-twin riders, you have two.
Can You Run a Lawn Mower Without an Air Filter? (No)
No. Dirt scores the cylinder within one dry cut, and 17 test sessions show how fast. Plus why yours runs better with the filter off, and what to do.
Clogged Lawn Mower Air Filter Symptoms (34-Mower Field Log)
Check 7 clogged air filter symptoms, run the 2-minute light test, and get the clean-or-replace call for paper, foam and dual filters.
Lawn Mower Spark Plug Black, Wet or Oily? (23 Plugs Read)
Match a black, wet or oily lawn mower spark plug to the decoder: dry soot means rich, wet gas means flooded, oil means rings. Cause plus fix.
How to Tell If a Lawn Mower Spark Plug Is Bad (12 Tested)
Check 5 symptoms, read the plug, then run the blue-spark test. Includes gap specs by engine brand, the stale-gas triage and when to clean vs replace.
How Sam’s guides are checked
Every guide on Mower Mentor follows the same published standards. If one falls short, tell us and we’ll fix it.
- 01How We Test Mower RepairsEvery fix is tried on a real mower first: the diagnosis, the readings, the part fit and the job.
- 02Editorial policyBrands can’t pay to change a guide, and anything paid for is labeled.
- 03Fact-checkingPart numbers and readings are checked against the test log and the manufacturer.
- 04Corrections policyConfirmed errors are fixed within 7 business days, directly in the guide.
- 05Sponsorship PolicyWhat brands can and can’t pay for, and how it’s labeled.