puttra

Verb

 * 1) to make a sound like boiling water
 * 2)  to simmer, to boil
 * 3)  to putter (make short, dull, quickly repeating noises (of some engines))
 * 1)  to putter (make short, dull, quickly repeating noises (of some engines))
 * 1)  to putter (make short, dull, quickly repeating noises (of some engines))

Usage notes
Like in, but dull and not too loud.