If your Ariens lawn mower is leaking gas, start at the carburetor. The most common cause of a lawn mower gas leak or gas leaking from the bottom of the lawn mower is a dried-out or missing carburetor bowl gasket. Next, check the float needle, since a worn needle may not shut off fuel flow and can let the carburetor overflow. A bad carburetor gasket is another likely reason for mower leaking fuel from the bottom of the carburetor. If the leak shows up when you prime the engine, inspect the primer bulb for cracks or brittleness. After that, look at the fuel shut-off solenoid and fuel lines for seepage, loose connections, cracks, or pinholes. A stuck carburetor float can also cause the carburetor leaking gas by holding the valve open, and in that case cleaning the carburetor may help, though some repairs call for a rebuild or replacement. Enter your Ariens model number on RepairClinic.com to find the exact carburetor bowl gasket, float needle, carburetor gasket, primer bulb, fuel shut-off solenoid, float, or other small engine parts that fit your mower.
01 - Ariens Lawn Mower Carburetor Bowl Gasket
If the lawn mower leaks gas the carburetor bowl gasket on the bottom of the carburetor might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor bowl gasket.
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The float needle might not be shutting off the fuel. The float needle opens and closes the float valve to allow fuel to enter the float bowl. If the float needle is damaged, the carburetor will continue to fill with fuel until it overflows. If the float needle is defective, replace it.
Check the fuel shut-off valve for leaks, and ensure that the fuel lines fit tightly on the valve. If the fuel shut-off solenoid is leaking, replace it. In addition, inspect the fuel shut off lines for cracks or tiny holes. If a fuel shut-off line is leaking, replace it.
The float might be stuck open. If the float is stuck open, remove the carburetor assembly from the engine and clean it thoroughly. If the cleaning the carburetor is not effective, either rebuild or replace the carburetor.