1.   Martin said the most common cause of a hung throttle is the accelerator linkage catching onto the air-cleaner base that lays over the top of the carburetor.

2.   Speculation as to the cause of the crash that killed teen-ager Adam Petty at New Hampshire International Speedway on Friday centers around a possible hung throttle.

3.   The final concern, which is growing among all race teams, is about hung throttles.

4.   Triplett said the idea of installing a toe clip to help a driver free up a hung throttle also was considered.