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.
There are many reasons why one could have burning feet. If you have not been diagnosed with diabetes, your burning feet could simply be from being tired. However, according to the Mayo Clinic, burning feet are sometimes a symptom of peripheral neuropathy, or nerve damage that could be caused by diabetes. Diabetes that is not under control can damage nerves in any part of the body, including those in your legs and feet.