If your Kohler small engine is leaking gas, start by checking the carburetor, since a dried-out or missing carburetor gasket is the most likely cause, especially when gas is leaking from the bottom of the carburetor. A damaged float bowl gasket or carburetor bowl gasket can cause the same symptom. Seasonal equipment with stale or ethanol-blended fuel left in the carburetor may develop brittle, damaged gaskets over time. If the leak is not at the carburetor, inspect the fuel tank for cracks, then check the fuel line for dry, split, or cracked sections. A leaking primer bulb is another common source of an engine fuel leak because its rubber can become brittle with age. Turn off the fuel supply before inspecting, and do not patch a leaking fuel tank, fuel line, or primer bulb. Replace the failed part instead. Enter your Kohler small engine model number to find the exact replacement carburetor gasket, float bowl gasket, fuel tank, fuel line, or primer bulb for your specific engine.
01 - Kohler Carburetor Gasket
The carburetor gasket might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor gasket.
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The carburetor float bowl gasket might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor float bowl gasket.
The carburetor bowl gasket might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor bowl gasket.
The fuel tank might be cracked or have a small leak. Inspect the fuel tank for leaks. If there is a leak, replace the fuel tank—do not attempt to repair it.
One or more of the fuel lines may have a leak. Inspect the fuel lines for cracks. If any of the fuel lines are cracked or dry, replace them. Do not attempt to repair a fuel line—if a fuel line is cracked, you must replace it.
The primer bulb may be leaking. Over time, the rubber of the primer bulb can become brittle and cracked, causing the bulb to leak gas. If the primer bulb is leaking, replace it. Do not attempt to patch or repair the primer bulb.
Over time, the carburetor may develop cracks due to the vibration and heat of the engine. If the carburetor is cracked, it will leak fuel. Inspect the carburetor for cracks or corrosion. If the main body of the carburetor is leaking, you will most likely need to replace the carburetor.