Replacing Mantis Tiller Fuel Line: A Step-By-Step Guide

If your Mantis tiller is not starting, you may need to replace the fuel lines and/or the fuel filter. The fuel filter should be replaced when it is hard to the touch, creased, or if fuel is not reaching the carburettor. You can purchase a fuel line kit for your Mantis tiller online, which typically includes the fuel filter, fuel lines, and a fuel grommet. When replacing the fuel lines, ensure that the fuel lines go from the tank to the carburettor, from the carburettor to the suction side of the primer, and then from the primer back to the tank.

Check if pipes and/or fuel filter are clogged

If your Mantis tiller is not starting, it is important to check if the pipes and/or the fuel filter are clogged. Clogged fuel filters can cause a host of problems, including engine failure to start, misfire or rough idle, vehicle stalling, fuel system component failure, and loud noises from the fuel pump.

To check if the pipes are clogged, you will need to inspect the fuel lines coming from the fuel tank, mounted near the tank on the vehicle's frame. Look for any signs of brittleness or damage that could be causing a blockage.

To check if the fuel filter is clogged, start by draining all the gas out of the fuel filter. Locate the inlet to the fuel filter, which should be labelled as "in" or have an arrow pointing to the direction of the fuel flow. Clean this inlet with a shop towel.

Next, place a disposable rag or shop towel on your workbench and gently blow into the inlet of the fuel filter, aiming towards the rag. If the filter is clogged, you will feel resistance when blowing into it. Be extremely cautious when performing this step, as gasoline is flammable and has a unpleasant taste and odour.

If you find that your pipes and/or fuel filter are clogged, you will need to replace them. Mantis tiller fuel line and filter replacement kits are available for purchase online and at various automotive stores. The replacement process involves disconnecting the old fuel lines and filter and installing the new ones, ensuring that the pipes are properly routed and the filter is correctly oriented.

It is important to consult a professional mechanic if you are unsure about any part of the process or if you do not have experience with fuel system maintenance.

Check if pipes and/or fuel filter are porous

To check if your pipes are porous, you should inspect them for any pinhole leaks. If your pipes are insulated, you should also check for any signs of damage to the insulation, as this could cause issues with the pipe. If you have copper pipes, be aware that there was a bad batch of copper from China a few years ago, which may have degraded over time.

If you are experiencing issues with your Mantis Tiller, it could be that the fuel filter is clogged. Fuel filters are made of pleated, porous materials, which can get clogged over time, especially if you are using lower-quality fuel. If your fuel filter hasn't been changed in a while, it may be time for a replacement.

Some symptoms of a failing fuel filter include a decrease in fuel efficiency, a check engine light turning on, and sputtering while accelerating. If your vehicle is slow to start, this could be a sign that the filter is moderately clogged, and it should be replaced as soon as possible to avoid a full blockage.

If you are unsure about the state of your vehicle's fuel filter, the best way to determine whether it needs to be replaced is by having a fuel pressure test performed by a qualified technician.

Change the filter if it is hard to the touch

If your Mantis tiller is not starting, it may be time to change the fuel pipes and/or filter. The filter should be changed when it is hard to the touch, or if it creases, or if fuel does not reach the carburettor.

• Relieve the pressure in the fuel system by locating and removing the fuel pump fuse. This will prevent the fuel pump from turning on with the engine.
• Ensure the vehicle is not in gear.
• Start the engine and let it run for a minute or two before shutting it off.
• Re-insert the fuel pump fuse.
• Disconnect the battery.
• Locate the fuel filter. In most modern vehicles, the fuel filter is located along the fuel line on the bottom of the car, just past the fuel pump.
• Place a bowl or bucket beneath the fuel filter to catch any fuel that may spill out when you disconnect the lines.
• Remove the clips holding the fuel filter in place using a flat-head screwdriver.
• Remove the fuel lines from the filter by sliding them away from the filter and towards the bowl or bucket.
• Slide the fuel filter out of its bracket.
• Compare the new filter to the old one to ensure they are the same size and will fit into the bracket.
• Slide the new fuel filter into the bracket.
• Fasten the fuel filter to the fuel line by sliding the lines onto the front and back of the filter and securing them with the plastic clips.
• Lower the vehicle off the jack stands if it was raised.
• Reconnect the battery.

Ensure the filter fits into the fuel tank

To ensure the filter fits into the fuel tank of your Mantis tiller, you will need a small flat screwdriver to take off the fuel grommet.

First, put the pipes through the grommet. The short black pipe (valve pipe) and the transparent pipe (return fuel pipe) must be next to each other. They should stick out from the grommet by about 5mm on the inside, where the grommet will go into the fuel tank.

Second, put the fuel filter on the long black pipe. Be careful about which side you are putting it on. The filter will have to fit into the fuel tank.

Third, put the valve on the short black pipe.

Then, enter the fuel filter into the fuel tank.

Finally, put the grommet in the hole provided.

Connect the long black pipe and the transparent pipe to the carburettor

Now that you have the replacement fuel line kit, you can begin the process of connecting the pipes to the carburettor.

First, identify the long black pipe and the transparent pipe. These two pipes will be attached to the carburettor. The transparent pipe will be placed on top of the carburettor, while the long black pipe will be attached to the bottom.

Next, carefully insert the pipes into the correct positions. Ensure that the long black pipe is securely connected to the bottom of the carburettor. Then, check that the transparent pipe is firmly attached to the top of the carburettor.

At this stage, the pipes should be protruding from the carburettor by a small amount. You can now move on to connecting the valve, which should be placed on the short black pipe under the starter.

Frequently asked questions