Choose Product
Identify Problem
03
Find Solutions

Green Machine String trimmer runs rough

Thumbnail for video "String Trimmer Runs Rough? String Trimmer Troubleshooting"
Featured Video

String Trimmer Runs Rough? String Trimmer Troubleshooting

02:25
8,015
47

Common solutions for: Green Machine String trimmer runs rough

01 - Carburetor
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to run roughly. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
Required Part
String Trimmer Carburetor
Enter model number to search for the required part specific to your product
Browse our parts categories to select from a variety of parts for your product
SHOP PARTS
Most Common Solution
02 - Carburetor Repair Kit
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to run roughly. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
Required Part
String Trimmer Carburetor Repair Kit
Enter model number to search for the required part specific to your product
Browse our parts categories to select from a variety of parts for your product
SHOP PARTS
Most Common Solution
03 - Fuel Filter
The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the fuel filter and cause the engine to run roughly. If old fuel was left in the string trimmer, drain the old fuel from the fuel tank and replace the fuel filter.
Required Part
String Trimmer Fuel Filter
Enter model number to search for the required part specific to your product
Browse our parts categories to select from a variety of parts for your product
SHOP PARTS
Common Solution
04 - Air Filter
If the string trimmer engine runs poorly the air filter might be clogged. Remove the air filter and inspect. If restricted replace with the correct filter.
Required Part
String Trimmer Air Filter
Enter model number to search for the required part specific to your product
Browse our parts categories to select from a variety of parts for your product
SHOP PARTS
Common Solution
05 - Spark Plug
Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between the tester’s terminals when the engine is cranking. If there is no spark, this indicates that the spark plug is defective and should be replaced.
Required Part
String Trimmer Spark Plug
Enter model number to search for the required part specific to your product
Browse our parts categories to select from a variety of parts for your product
SHOP PARTS
Common Solution
06 - Spark Arrestor
The spark arrestor is a small screen that prevents the engine from emitting sparks. Over time, the spark arrestor can become clogged with soot. If the spark arrestor is clogged, the engine may run roughly. To unclog the spark arrestor, remove it and clean it with a wire brush. You may also replace the spark arrestor.
Required Part
String Trimmer Spark Arrestor
Enter model number to search for the required part specific to your product
Browse our parts categories to select from a variety of parts for your product
SHOP PARTS
Common Solution

The Right Parts for the Job

We carry more than 4 million parts from over 175 major brands, so chances are, we've got the part you need.
SHOP FOR PARTS