String Trimmer Won't Start After Winter
Weed eater and string trimmer no-start fixes — fuel mix, carb varnish, spark, and proper spring startup.
🧰 Tools for this repair
Quick links to the gear I use on this job.
- Spark Plug Tester
Price:$5.99
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Video Tutorial
String Trimmer Won't Start After Winter
I'm filming this walkthrough for YouTube. Subscribe on the channel so you catch it when it drops.
Subscribe on YouTubeQuick overview
Steps at a glance
Estimated time: 45 min
- 1
Check Fuel Mix and Freshness
Drain old fuel, use fresh mix at the ratio your manual specifies, or use canned premix for small tanks.
- 2
Spark and Air Filter
Confirm spark at the plug with a spark tester or by laying the plug on the metal part of the engine. If plug looks bad replace with saame part number. Then replace foam air filters that crumbled over storage.
- 3
Carb Path
If it will not fire on fresh mix, carb cleaning is next — same principles as my [carburetor cleaning guide](/blog/carburetor-cleaning-guide). Basically, you may need to drain old fuel out and look really closely for any varnish.
Trimmers sit all winter with fuel in the tank more often than mowers. Spring no-start on trimmers is usually stale gas or a gummed carb.
In this guide, I’ll show you:
- Check Fuel Mix and Freshness
- Spark and Air Filter
- Carb Path
Check Fuel Mix and Freshness
Drain old fuel, use fresh mix at the ratio your manual specifies, or use canned premix for small tanks.
Spark and Air Filter
Confirm spark at the plug and replace as needed with original part number. Then replace foam air filters that crumbled over storage.
Carb Path
If it will not fire on fresh mix, carb cleaning is next — same principles as my carburetor cleaning guide.
DIY Veteran Tips
I run my trimmer dry at season end or use stabilizer — same rule as every small engine.
Final Thoughts
Fresh fuel mix, clean air, and a clear carb fix most trimmer no-starts after storage.
Creator picks
Tools & products for this job
Gear I reach for on this kind of repair. Each links to my full review where available.
Spark Plug Tester
Quick and reliable way to check if your spark plug is firing. Essential for small engine troubleshooting.
+ Instant yes/no spark confirmation without guessing
+ Compact and lives in my mower troubleshooting kit
− Only checks spark — won't diagnose fuel or compression issues
Price:$5.99
Order now atAs an Amazon Associate, I earn from qualifying purchases at no extra cost to you. Links open Amazon's secure site — we never see your payment info.
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