My existing motor that is out reads # 117939-00
Does the -00 mean anything, because i don't see one like this.
My silent master Vac is model 108SE You refer to models like S4,S5 ect.
I'm not sure what my model is I guess, I am just looking at Lamb motor # 117939-00 This unit is 5yrs old and has two motors. Should I replace 1 or 2?
You have found the right motor here, it is the 117939-00 (if you have other -## this is still the replacement). Your call for one or two motors, but experience says that the second motor will go out sooner than later. It depends on your time and money. If you have any more questions please let us know.