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HomeRepair HelpMTD RepairMTD Small engine leaks gas Repair
MTD Small engine leaks gas
If your MTD small engine is leaking gas, start by checking the carburetor, especially the gasket at the bottom of the carburetor. A dried-out or missing carburetor gasket is the most likely cause of a carburetor leaking gas. If the leak is around the float bowl, the carburetor float bowl gasket or carburetor bowl gasket may be damaged and need replacement. Next, inspect the fuel tank for cracks or seepage, then examine the fuel line for dry, cracked sections. A brittle or split primer bulb can also cause an engine fuel leak. Stale or ethanol-blended fuel left in the carburetor on seasonal equipment can damage gaskets and rubber parts, so consider this when troubleshooting a small engine leaking gas. Turn off the fuel supply, keep gasoline away from sparks and hot surfaces, and replace cracked fuel tanks, fuel lines, and primer bulbs rather than attempting to patch them. Enter your MTD model number to find the exact replacement carburetor gasket, float bowl gasket, fuel tank, fuel line, or primer bulb for your specific engine.
01 - MTD Float Bowl Gasket
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.
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02 - MTD Carburetor 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.
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03 - MTD 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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04 - MTD Fuel Tank
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.
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05 - MTD Fuel Line
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.
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06 - MTD Primer Bulb
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.
Highly Likely
07 - MTD Carburetor
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.
Common
Frequently Asked Questions
Why is my MTD small engine leaking gas from the carburetor?
What should I check if my MTD small engine is leaking fuel from the tank or fuel line?
Can old gas cause an MTD small engine to leak gas?
How do I safely inspect an MTD small engine fuel leak?
How do I find the correct replacement part for my leaking MTD small engine?
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