Kubota Lawn Mower is Leaking Fuel

An evaporating gas leak will leave no physical signs. The difficulty of finding a leak on your Kubota can be increased as a result.

A faulty gasket, stuck float needle, or stuck float cap may cause a Kubota lawn mower to leak fuel. The filter, fuel lines, tank, pump, and shut-off valve may also leak fuel.

You can check some of these items to see if your Kubota mower has a fuel leak when you are searching for a cause Kubota Lawn Mower is Leaking Fuel.

Your lawn mower can get worn down over time, and you may encounter new problems that you haven’t encountered before. One of those problems you’ve probably never had to worry about before is leaky gas. Hence, if you see a leak in your lawn mower or it seems to be burning through gas faster, you need to fix it right away.

To stop the leak of gasoline, let’s look at where it can come from.

Kubota Lawn Mower is Leaking Fuel

There is a manual that comes with every lawnmower that tells you how much gasoline you can use. It is imperative to follow your user manual and any raised or printed indicators on or in the fuel tank; otherwise, you may run into more problems.

Gas-powered lawnmowers have additional space in their fuel tanks because fuel expands when heated (source). Fuel expands when you fill up your tank to the point where the pressure becomes so high that it pushes gasoline out of your cap’s vent.

Whenever you see fuel escaping from the cap, you’re probably dealing with overfilling. Check your fuel level and make sure it is above the fill line. 

There are a few things you need to do to fix your problem:

• Switch off your mower
• Cool down the fuel in the tank
• Fill a bucket with gasoline or place a gas can under the fuel line
• Fuel lines must be unhooked from the gas tank
• Drain the excess gas from the tank until it falls below the fill line
• Ensure the fuel line is reattached 
• Excess gas should be relocated to a safe location
• Make sure the mower is running again.

YouTube video: Check the fuel tank venting in this video:

A faulty seal in Kubota’s gas cap is causing gas to leak

In case you have checked all the items above and still cannot locate the leak, you should check the gas cap.

Whenever you smell gas fumes but see no wet spots on your mower, there is a possibility that fuel is leaking near your gas cap. After the fuel evaporates, a strong odor of fuel is left behind.

You can experience problems with the seal on the gas tank cap by placing it on your tank and not forming a seal. The gas cap area can be found by rocking the Kubota back and forth and splashing fuel from the tank.

On the outside of your fuel tank, be on the lookout for a wet spot around the fuel cap. When you discover that your gas cap has a leak, you should replace it.

There is a leak in the fuel lines on the old Kubota

Your fuel lines can become dry and cracked over time, resulting in leaks. Fuel lines are usually secured with clamps at the ends. Check this. Leaks in lines can be caused by clamps puncturing holes in the lines.

Using a worm gear clamp instead of a pinch-style clamp on your mower is a reliable way to prevent leaks. Whenever possible, replace old fuel lines with the latest ones.

Does a leaking riding lawn mower cause problems?

The two types of lawnmowers may seem similar, except for the fact that riding mowers leak gas. There are many similarities between the causes and fixes of these issues.

The only differences are that riding mowers may have longer fuel lines and double fuel tanks, and they are unlikely to have priming bulbs. You must note that the fundamentals of the fuel systems will be the same, so you must investigate the root cause as well. There may be differences in how the parts look, but they perform the same function.

If you go through the same list of potential causes, you should find a cause for the leak in your riding lawn mower.

How Does Your Mower Work Without a Fuel Cap?

It might be time to ask, can you run your mower without the fuel cap? That sure does seem like a quick fix to most of the pressure issues we’ve discussed so far! It is possible to operate your lawn mower without a gas cap, but we don’t recommend it.

As gas sloshes around in your mower’s tank as you run it without a cap, you might spill it unnoticed as you mow. This poses a fire hazard.

Furthermore, gas caps prevent the accumulation of sediment and debris in your gas tank. Having sediment in your lawnmower’s tank can make it difficult to start or damage the engine entirely.

Lastly, gas caps keep out harmful fumes.

There’s no point in taking a risk. 

Gas is leaking from the Kubota fuel switch-off valve

There may be a metal or plastic fuel shut-off valve on your Kubota lawn mower. You will find the fuel shut-off valve on the bottom of your fuel tank.

An ignition switch is used to turn on and off fuel flow. Leaks can occur with either metal or plastic valves. In case of leaking fuel shutoff valves, replace them Kubota Lawn Mower is Leaking Fuel.

Conclusion

Lawnmowers that emit gas from the gas tank usually have a problem with the gas cap. In the event that a tank is overfilled, a properly fitted cap should prevent damage.

Make sure the seal isn’t cracked, and if necessary, replace it. We cannot ignore this issue or simply run without a gas cap. There’s a real reason why that’s the case. Online dealers (such as Amazon) or manufacturers’ websites can be found if you’re looking for a replacement gas cap.