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HomeRepair HelpMTD RepairMTD Lawn mower leaking gas Repair
MTD Lawn mower leaking gas
If your MTD lawn mower is leaking gas, start at the carburetor. The most common cause is a dried out or missing carburetor bowl gasket, especially when gas is leaking from the bottom of the lawn mower or the bottom of the carburetor. Next, check the float needle, since a damaged needle can fail to shut off fuel and let the carburetor overflow. A bad carburetor gasket is another likely source of a lawn mower gas leak, followed by a cracked primer bulb that can seep fuel as the rubber ages. If those parts look good, inspect the fuel shut-off solenoid and attached fuel lines for leaks, then check whether the carburetor float is stuck open. In that case, cleaning the carburetor thoroughly may help, but you may need a carburetor rebuild or full replacement if the problem continues. Whether you are dealing with an MTD mower leaking fuel or a carburetor leaking gas, entering your model number on RepairClinic.com is the fastest way to find the exact replacement part that fits your machine.
01 - MTD 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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02 - MTD Float Needle
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.
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03 - MTD Carburetor Gasket
If fuel is leaking from the bottom of the carburetor, the carburetor gasket might be dried out or missing.
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04 - MTD Primer Bulb
Over time, the rubber of the primer bulb can become brittle and cracked. If the primer bulb is leaking, replace it. Don't try to patch or repair it.
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05 - MTD Fuel Shut-Off Solenoid
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.
Highly Likely
06 - MTD Float
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.
Highly Likely
Frequently Asked Questions
Why is my MTD lawn mower leaking gas from the bottom of the carburetor?
Can a bad float needle cause an MTD mower leaking fuel problem?
Is it safe to use my MTD lawn mower if the primer bulb is leaking gas?
How do I find the right MTD lawn mower gas leak part on RepairClinic.com?
When does an MTD lawn mower leaking gas problem need a professional repair?
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