Symptoms of Malfunction. The failure of the trimmer head to spin when you engage the throttle isn't necessarily a sign of a broken shaft -- it could also be a broken clutch. When the shaft is broken, however, you'll notice excessive vibrations in the shaft housing or in the handles.f you jam the trimmer head against a rock while it is spinning at full throttle, however, the shaft may sever. To get the upper part out, you may have to disassemble the shaft housing from the engine housing. To do this, disconnect the throttle cable and disconnect the ignition wires.
Blue Toe Syndrome. Blue toe syndrome, also known as Trash Foot or Purple Toe Syndrome, is caused by a blockage of the small blood vessels in the foot that reduces the flow of blood and oxygen to the tissues. It usually develops due to a problem higher up the blood stream such as an aneurysm or atherosclerosis.
Several things may cause numbing in your feet. One cause could be from diabetes. When diabetes is untreated, unrecognized, or undertreated it can cause damage to your nerves. This condition is known as neuropathy. Another cause could come from circulatory problems in your feet. If you are wearing shoes that are too tight, the circulation, or blood flow, to your feet can be decreased. If you have unknown, untreated, or undertreated high blood pressure, this too can cause circulation problems, which could lead to numbness in your feet. If you have any type of decreased flow to or from your feet, numbness in your feet may also arise.