Shindaiwa Inc., of Tualatin, Ore.

The muffler's retaining bolts can allow the muffler to come loose from the engine while the hedge trimmer is in operation. A loose muffler can contact and damage the fuel tank, creating a fire hazard.

The fuel cap on the hedge trimmer can leak, posing a fire and burn hazard.

The catalytic muffler can overheat and damage the fuel tank, posing a fire hazard.