Small Engines (Lawn Mowers, etc.): bolts that hold muffler on head

Question
I can not keep bolts in that keeps muffler on head?

Answer
Lawn mower?  Log splitter?

Regardless of the power equipment you have a vibration problem...too much vibration.  You need to solve the vibration problem to keep the bolts from vibrating loose.

Let me know what the engine is powering...mower, snow blower?

Eric