Rick Writer Posted January 15, 2021 Report Share Posted January 15, 2021 What is the lifespan of a lawnmower's spark plug, and why they doesn't have lifespan as like our car's sparkplugs. And what you guys do? Replace the old one, or your clean it and use it again? Are they worth using after cleaning? And how often you clean them? Quote Link to comment Share on other sites More sharing options...
Eric - TIA Posted January 15, 2021 Report Share Posted January 15, 2021 Great question. I have been using battery for so long, i forgot about spark plugs. In regards to life span, I had a mower that was 10 years old and never replaced it. I never cleaned it or did anything. The mower before I cleaned the spark plug once and reused it. The only reason i reused it was because I was to lazy to go to the local store, I just wanted to cut my grass and be done. Quote Link to comment Share on other sites More sharing options...
wingless Posted January 15, 2021 Report Share Posted January 15, 2021 My experience is that plug cleaning is a feel good emergency measure, but very limited utility. If the plug is bad toss it. IMO, the plug lifetime is based on other factors, such as maintaining the air filter as clean. If I am doing dusty mowing and don't clean the air filter, then my plug suffers. Otherwise, I get years and years from my plug. On my 1985 Snapper 21" walk behind, I find decreased power means the plug needs replacement. 1 Quote Link to comment Share on other sites More sharing options...
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