Replacing Fuel Filter: Mantis Tiller Maintenance Guide

If your Mantis tiller is not starting, it is important to check if the fuel filter is clogged or if the fuel has been left in the tank for more than 30 days, in which case the pipes and the fuel filter may need to be changed. The fuel filter should be changed when it is hard to the touch or if it creases or fuel does not reach the carburettor.

Check if the fuel filter is clogged

If your Mantis tiller is not starting, it is important to check if the fuel filter is clogged.

Firstly, check if there is any fuel left in the tank. If there is, drain out the old fuel and dispose of it properly. Once the tank is empty, push the primer bulb on your tiller 7-8 times to clear out any fuel in the carburettor. Then, empty the tank again.

Next, check the fuel filter. If it is clogged, replace it according to the instructions in the manual. The check valve may be out of position. The check valve is one of the two black tubes coming from the fuel tank; it has a white cap on the end of the tube. That tube needs to go into the hole on the side of the red engine cover, located above the carburettor.

If the fuel filter is not clogged, the issue may lie elsewhere. Check the fuel pipes to see if they are clogged or have become porous. If so, they will need to be changed.

Check if the filter is hard to the touch

If your 2-stroke Mantis tiller is not starting, you should check if the pipes and/or the fuel filter are clogged. If the fuel filter is clogged, it will need to be changed.

The fuel filter should be changed when it is hard to the touch, or if it creases, or if fuel does not reach the carburettor.

To check if the filter is hard to the touch, simply touch the filter and assess whether it feels hard. If it does, then it needs to be changed.

• Take off the grommet using a small flat screwdriver.
• 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 and stick out from the grommet by about 5 mm on the inside, where the grommet will go into the fuel tank.
• Put the fuel filter on the long black pipe, ensuring that the filter will fit into the fuel tank.
• Put the valve on the short black pipe.
• Insert the fuel filter into the fuel tank.
• Put the grommet in the hole provided.
• Connect the long black pipe and the transparent pipe to the carburettor (the transparent pipe should be on top of the carburettor and the long black one at the bottom).
• Place the valve on the short black pipe under the starter.

Check if the filter has creases

To check if the fuel filter has creases, you should first remove the fuel tank lid. Then, pull out the fuel line through the fill hole. Check the fuel strainer (the fuel filter) for creases. If there are creases, the fuel strainer should be changed.

The fuel strainer is located inside the fuel tank. It allows a steady flow of clean fuel to go to the carburettor by straining out any sediment that has entered the fuel tank. Stale fuel will shorten the life of the fuel strainer. Therefore, it is important to check the fuel strainer for creases, especially if your tiller has been stored away for a few months.

If the fuel strainer is hard to the touch or creased, or if fuel does not reach the carburettor, the filter should be changed.

Check if fuel reaches the carburettor

To check if fuel reaches the carburettor of your Mantis tiller, you must first check if the pipes and/or the fuel filter are not clogged. If your machine does not start, this could be the reason.

If some mixture has been left in the tank for more than 30 days, you must check if the pipes and/or the fuel filter need to be changed as they become porous. The filter should be changed when it is hard to the touch or if it creases, or if fuel does not reach the carburettor.

To check this, you will need a small flat screwdriver to take off the fuel grommet. Then, put the pipes through the grommet, ensuring that 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.

Next, put the fuel filter on the long black pipe, ensuring that the filter will fit into the fuel tank. Then, put the valve on the short black pipe.

After this, enter the fuel filter into the fuel tank and put the grommet in the hole provided. Finally, 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 one at the bottom.

Remove the fuel grommet

To remove the fuel grommet, you will need a small flat screwdriver.

First, take off the grommet using a screwdriver. Then, put the pipes through the fuel 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.

Frequently asked questions