Carburetor Problems Cause Mower Engines Not To Start The carburetor regulates how air and fuel move through the engine to power your equipment. If it is dirty, that can cause poor engine performance or starting problems.
Make sure that the air coming into the carburetor is clean and free of debris by inspecting the air filter. A clogged air filter is a common cause for black smoke emitting from the exhaust. Linkages attached to the carburetor’s throttle and choke plates can bind or stick when dirty.
Constant vibration and wear can affect the setting of the carburetor’s mixture screws (if equipped). With all of the grass, twigs and other debris that a small engine encounters, it’s not surprising that even passages inside the carburetor eventually pay a price.
Deposits inside the carburetor can clog fuel and air passages and reduce performance or stop the engine altogether. Small Engine Carburetor CleanerLuckily, you can take care of many of these problems quickly and easily; often without even removing the carburetor from the engine.
Commercially available carburetor cleaner comes in convenient spray cans for periodic cleaning of both inside and outside the carburetor. In addition to cleaning the carburetor, many engine performance problems can be linked to maintenance issues such as stale fuel, dirty air filter, fouled spark plug, and deteriorated oil.
Rebuilding the carburetor may be required if basic adjustments don’t fix your small engine problems or improve performance on your lawn mower or outdoor power equipment.