Overusing ether in an engine can cause which of the following damages?

• A. Piston and ring damage
• B. Valve seat recession
• C. Crankshaft fracture
• D. Timing chain wear

Answer: (A)

Ether starting fluid is extremely volatile and combusts very rapidly. When too much is used, the engine experiences a sudden, high-pressure ignition that can push the piston harder than normal and stress the ring grooves and piston lands. This abnormal loading wears or scars the piston rings and their seating areas, leading to piston and ring damage. Additionally, the ether can wash away some of the lubricating oil from the cylinder walls, increasing wear on the rings and piston skirts. That combination—excessive pressure and reduced lubrication—is what drives the damage in this scenario. Other options don’t fit as directly: valve seats aren’t typically affected by starting fluid alone, crankshaft fractures are less common from ether use, and timing chains wear more from lubrication and tensioning issues than from starting fluid.