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.
Lee Sanders, DPM, responds: A painfully hot or burning sensation in the feet, especially in middle-aged and older people, could be caused by small fiber neuropathy. Diabetes is the most common cause of this condition; symptoms typically start with burning feet and numb toes. Even though your friend was only recently diagnosed with diabetes, if it is the cause of the burning in his feet, then he has probably had impaired glucose tolerance for years now.