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If your Mantis tiller is not starting, it may be time to replace the fuel lines. This is a common issue, with many users reporting that their fuel lines had become brittle and broken, or clogged and porous after being left with fuel inside for over 30 days. Luckily, the fuel lines are easy to replace and kits are readily available online. The process involves removing the fuel grommet, installing new fuel lines and a fuel filter, and connecting the lines to the carburettor.
What You'll Learn
Check if pipes and/or fuel filter are clogged
If your Mantis tiller is not starting, you need to check if the pipes and/or the fuel filter are clogged. If some mixture has been left in the tank for more than 30 days, the pipes and/or the fuel filter may need to be changed as they become porous.
The fuel filter should be replaced when it is hard to the touch, or if it creases, or if fuel does not reach the carburettor. If the filter is clogged, it will restrict fuel flow to the engine, and the engine may not start.
To check if the fuel filter is clogged, first, drain all the gas out of the fuel filter. Then, find the inlet to the fuel filter (it should be labelled as "in" or have an arrow pointing to the direction of the fuel flow) and clean the inlet with a shop towel. Place a disposable rag or shop towel on your workbench and gently blow into the inlet of the fuel filter, aiming towards the shop rag on the bench. If the filter is clogged, you will not be able to blow into it easily.
The fuel lines should go from the tank to the carburettor, from the carburettor to the suction side of the primer, then from the primer back to the tank. The fuel lines should not be pushed to the carburettor, as this will cause problems.
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Check if pipes and/or fuel filter need to be changed
If your Mantis tiller is not starting, you must check if the pipes and/or the fuel filter are clogged. If a fuel mixture has been left in the tank for more than 30 days, you should check if the pipes and/or the fuel filter need to be changed, as they can become porous.
The fuel filter should be changed if it feels hard to the touch, or if it creases, or if fuel is not reaching the carburettor. If the filter is creased, it may be difficult to determine by touch alone, so ensure you check the filter carefully and look out for any creases or signs of damage.
You can also check if the fuel lines need to be changed by looking for signs of damage or brittleness. If the lines have become brittle, they may need to be replaced. If the fuel lines have rotted, this will also require replacement.
If you are unsure whether the fuel lines need to be replaced, it may be helpful to refer to a how-to guide or seek advice from a professional.
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When to change the filter
If your Mantis tiller does not start, you should check if the fuel filter is clogged. If some mixture has been left in the tank for more than 30 days, you should check if the fuel filter needs to be changed as they become porous over time.
The filter should be changed when it is hard to the touch, or if it creases, or if fuel does not reach the carburettor.
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How to put pipes through the grommet
To put pipes through the grommet when replacing the fuel lines on a Mantis tiller, follow these steps:
Firstly, ensure you have the correct size of grommet for your pipes. Rubber grommets come in various sizes, dimensions, and diameters, so it's important to select the right one for your specific pipe size. In the case of the Mantis tiller, you will be using the 2-stroke Kitpipe, which includes two black pipes and one transparent pipe. Choose a grommet that is slightly larger than the outer diameter of your pipes to ensure a tight fit.
Next, you will need to insert the pipes through the grommet. The short black pipe (valve pipe) and the transparent pipe (return fuel pipe) must be placed next to each other and should stick out from the inside of the grommet by about 5 mm. This is where the grommet will connect to the fuel tank.
Now, carefully push the pipes through the grommet, ensuring that they remain securely in place. You may need to apply a small amount of lubrication to the pipes to make this process easier. Once the pipes are through, pull them gently to ensure they are seated properly in the grommet.
At this point, you can secure the grommet in the designated hole, following the instructions provided by the manufacturer of your Mantis tiller. Make sure that the grommet is firmly in place and sealed to prevent any leaks.
Finally, connect the pipes to the carburettor, with the transparent pipe on top and the long black pipe at the bottom.
By following these steps, you will have successfully put the pipes through the grommet when replacing the fuel lines on your Mantis tiller.
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How to connect pipes to the carburettor
To connect pipes to the carburettor of a Mantis tiller, follow these steps:
Firstly, check that the pipes are not clogged or porous. If your machine is not starting, this could be the issue. If the pipes are clogged or porous, they will need to be replaced. You can purchase a 2-stroke Kitpipe, which contains two black pipes, one transparent pipe, one fuel filter, and one fuel grommet.
Once you have the necessary parts, follow these steps:
- Put the pipes through the grommet. The short black pipe (valve pipe) and the transparent pipe (return fuel pipe) should be placed next to each other and should stick out from the grommet by about 5mm on the inside.
- Place the fuel filter onto the long black pipe, ensuring that it is on the correct side so that it will fit into the fuel tank.
- Put the valve on the short black pipe.
- Insert the fuel filter into the fuel tank.
- Place the grommet in the designated hole.
- Connect the long black pipe and the transparent pipe to the carburettor, with the transparent pipe on top of the carburettor and the long black pipe at the bottom.
- Place the valve, which is on the short black pipe, under the starter.
Your pipes should now be successfully connected to the carburettor.
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