Why is the carburetor of a micro tiller leaking gasoline?
2 Answers
Micro tiller carburetor leaking gasoline reasons are as follows: Oil seal issues: Pay special attention to whether there is oil leakage at the front 4102 and rear oil seals 1653 of the crankshaft. If the front oil seal of the crankshaft is broken, damaged, aged, or the contact surface between the crankshaft pulley and the oil seal is worn, it will cause oil leakage at the front of the crankshaft. If the rear oil seal of the crankshaft is broken or damaged, or the oil return hole of the rear main bearing cap is too small, causing oil return obstruction, it will lead to oil leakage at the rear of the crankshaft. Camshaft rear oil seal issues: Additionally, check whether the rear oil seal of the camshaft is leaking. If the oil seal is aged or broken, causing oil leakage, it should be replaced promptly. Besides, also inspect whether there is any external leakage in the components of the engine lubrication system.
I have some experience in repairing small machinery. The most common cause of a carburetor leaking gasoline is a stuck float that fails to close the fuel passage in time, allowing gasoline to overflow. For example, the float may be jammed by debris or damaged and deformed. Another possibility is wear on the needle valve, leading to poor sealing and gasoline seepage. Aging or damaged gaskets are also a common factor, and loose installation screws can cause leaks as well. When a leak is detected, it's crucial to shut down the engine immediately—safety first—to avoid the risk of fire. Next, you can disassemble the carburetor, carefully clean the float and needle valve parts, and spray them with carburetor cleaner. If the problem is severe, replacing parts or performing a complete maintenance is necessary. Regularly checking the fuel lines and filters can prevent similar failures, and a thorough service before the busy farming season is particularly helpful in making the machinery more durable and safer.
