Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Choose Product
Identify Problem
03
Find Solutions
HomeRepair HelpHonda RepairHonda Small engine runs poorly Repair
Honda Small engine runs poorly
If your Honda small engine runs poorly, runs rough, surges, sputters, hesitates, or loses power, the carburetor is the most likely cause. Stale or ethanol-blended fuel left in the carburetor, especially on seasonal equipment, can evaporate and leave sticky deposits that clog the passages and cause small engine carburetor problems. Clean the carburetor with carburetor cleaner first. If cleaning does not restore smooth operation, install a Honda small engine carburetor repair kit or replace the carburetor. Next, inspect the spark plug for a cracked insulator, damaged electrode, heavy carbon buildup, or no strong spark while the engine is cranking. Replace a defective spark plug. A clogged fuel filter is less common but can also restrict fuel flow and cause the engine to run rough, particularly after old fuel was stored in the fuel tank. Drain stale fuel and replace the fuel filter as needed. Enter your model number to find the exact replacement carburetor, repair kit, spark plug, or fuel filter for your specific Honda engine.
01 - Honda Carburetor
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine 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.
Enter model number to search for the required part specific to your product
Top Solution
02 - Honda Carburetor Repair Kit
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine 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.
Top Solution
03 - Honda 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.
Highly Likely
04 - Honda Fuel Filter
The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving fuel in the engine 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 engine, drain the old fuel from the fuel tank and replace the fuel filter.
Less Common
Frequently Asked Questions
Why is my Honda small engine running rough or surging?
Can a bad spark plug make a Honda small engine run poorly?
Can old fuel or a clogged fuel filter cause my Honda engine to sputter and lose power?
How do I find the correct replacement part for my Honda small engine?
What should I check before calling a technician for a Honda small engine that runs poorly?