Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpHonda RepairHonda Lawn mower smoking Repair
Honda Lawn mower smoking
If your Honda lawn mower is smoking, especially if you see black smoke, the engine is usually getting too much fuel. In most cases, a lawn mower smoking problem comes from the carburetor running rich because the carburetor float is stuck open or the choke is stuck closed, which throws off the air-fuel mix. That makes the mower blow black smoke and can leave your Honda lawn mower engine smoking during startup or while mowing. The most likely fix is to inspect the carburetor for wear, sticking parts, or fuel contamination, then clean or rebuild it if needed. If cleaning is not enough, replacing the carburetor or installing a carburetor repair kit is often the right move. Pay close attention to the float and related carburetor components, since those are common causes of a Honda mower running rich. RepairClinic.com makes it easier to match the right fix to your machine. Enter your model number to find the exact Honda carburetor or carburetor repair kit that fits your specific lawn mower so you can solve the smoking issue without guessing.
01 - Carburetor is Letting Too Much Fuel In
If the lawn mower engine produces black smoke, this indicates that the carburetor is getting too much fuel (or "running rich"). If the carburetor float is stuck open, the engine will get too much fuel. Similarly, if the carburetor choke is stuck closed, the lawn mower engine will not be able to draw in enough air to create the proper air-fuel mixture.
Top Solution
02 - Honda Carburetor
If the lawn mower engine produces black smoke, this indicates that the carburetor is getting too much fuel (or "running rich"). If the carburetor float is stuck open, the engine will get too much fuel. Similarly, if the carburetor choke is stuck closed, the lawn mower engine will not be able to draw in enough air to create the proper air-fuel mixture.
Enter model number to search for the required part specific to your product
Top Solution
03 - Honda Carburetor Repair Kit
If the lawn mower engine produces black smoke, this indicates that the carburetor is getting too much fuel (or "running rich"). If the carburetor float is stuck open, the engine will get too much fuel. Similarly, if the carburetor choke is stuck closed, the lawn mower engine will not be able to draw in enough air to create the proper air-fuel mixture.
Top Solution
Frequently Asked Questions
Why is my Honda lawn mower smoking black?
Can a carburetor cause a Honda mower to blow black smoke?
Should I replace the carburetor or use a carburetor repair kit on my Honda lawn mower?
How do I know if the choke is causing my Honda lawn mower engine smoking problem?
How do I find the right Honda lawn mower carburetor part or repair kit?
Shop by Honda appliance Parts
Shop by Popular Honda Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com