Disassembly will be rquired to diagnose and/or repair the starter recoil unit. This is a common problem that is caused by a less than stellar design/poor engineering and normal wear and tear. The manufacturer like to use a lot of plastic in the parts and they don’t wear very well.
How to Identify and Fix Common Gardening Problems ?
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The most common reason for the cord refusing to rewind is a broken or worn out recoil spring. This tiny spring hooks onto the pulley and is stretched out when you pull the cord; when you let go the spring is meant to snap back to its original position.
A gas trimmer`s engine may be faulty. The air filter or exhaust port may be blocked. The trimmer may need lubrication and cooling fins or air passages may be blocked. A cordless trimmer`s battery or charger may be faulty.
If your 2-stroke brushcutter fails to start, the simplest explanation is that there is not enough fuel: in this case you simply need to top it up. A 2-stroke brushcutter engine runs on fuel/oil mixture, which you can buy ready prepared, such as EFCO-Mix Alkilate alkylated mixture in a 5 L can.
Turn on the ignition switch and pull the starting cord quickly. You should see a spark in the plug gap. Since the spark may be faint, it may help to do the test in a dark area. If there is no spark, check for a broken or shorted (bare) lead wire or bad switch.
Sometimes, when your starter rope will not retract into your leaf blower, it can be because it is jammed between the pulley and the housing, or it is wrapped around the hub. In this case, you will often be able to fix the symptom by simply opening the machine and untangling or removing the rope from where it is stuck.
The most common problem with a strimmer not starting is that there`s a problem with the fuel mix. Double check that you`ve used 40 parts fresh unleaded petrol to 1 part 2-stroke oil (40:1). Check the petrol you`ve used isn`t stale.
If you`ve used the correct procedure to start your Stihl trimmer and it does not start, the problem is likely related to either the spark, the fuel or the air circulation in the combustion chamber. More often than not, it`s an easy fix, possibly involving replacement of a spark plug or air filter.
Typically, the most common reason that a trimmer refuses to start is that it has simply run out of gasoline. Before considering any other solution to this problem, fill the fuel tank to capacity and try starting the trimmer again. It`s also worth noting that old or stale gasoline could cause a similar problem.
Cable or Shaft
If the drive cable breaks or becomes detached, the saw blade will no longer spin. You can inspect the drive cable by removing the engine assembly from the shaft and checking to see if the cable is still in place. If the cable has slipped out of place, it will need to be reinstalled firmly.
If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead.
If the ignition coil does not have spark, it`s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
Check for a plugged hose
Plugged vacuum hoses are sometimes the reason for a loss in suction. Hoses can get clogged with hair, dust bunnies, string, or anything else that can`t pass through the other end of the hose. Airways inside the machine should be looked at as well. Wherever there is an air passage, check it.
Running Over the Cord
That same motion that forces the dirt up into your vacuum cleaner can fray or damage the exterior of the cord. Over time, even the best cords will start to show damage, making them unsafe for use.