The most common problem with gasoline Clippers is that they become difficult to start. Sometimes they start easily, and sometimes they don't start at all. The engine of a gasoline trimmer that starts with ease is in good condition. So when you start experiencing these problems, you know that you need to reinforce your maintenance program. There are many problems that can prevent the engine from starting. It fixes the most common problems without the help of a professional.
Clean the air filter if necessary. The air filter prevents dirt and debris from entering the combustion chamber. Dirty air filters prevent air from getting into the combustion chamber. Small motors are designed to require the air/fuel ratio to be correct before starting.
Unplug the wire from the spark plug. Unscrew the spark plug with the appropriate tool. Replace the spark plug if you have more than one or two age periods. If the spark plug is relatively new, check for damage or wear. Clean the end of the spark plug electrode with a rag. If after cleaning the spark plug, it is seen to be in good condition, check the gap with a wire gauge (the gap must be between 0.020 and 0.032 inches, 0.050 and 0.081 cm, depending on the brand and model of the mower) and reinstall the spark plug. If the plug is damaged, change it. Replace the Plug and re-connect the spark plug wire.
Empty the fuel tank into an approved fuel storage container. Fold an 8-inch (20 cm) piece of metal hook-shaped wire and insert into the empty fuel tank. Pull the tube with the fuel filter attached to the end outside the tank. Inspect and clean with a non-flammable solvent. Re-install if not damaged. If it looks damaged or too dirty when you remove it from the fuel tank, change it.
Add new, stabilized fuel to the tank. The old fuel will not allow the engine to start very easily. The fuel expires in 30 to 90 days if it does not stabilize with a stabilizing additive, which will help it last up to one year. Try to start the engine. If you do not start, take the mower to your local dealer.