On May 23, 3:25*pm, "Dave" wrote:


So how do you know if an air filter is still usable? *Inspect it visually.
Can you see any holes that will allow dust to travel through the filter,
unimpeded? *If not, then keep using it. *If you're really paranoid, replace
it once a year or once every other year. *If you're not paranoid, just blow
it out after every mowing, then carefully inspect it before reinstalling
t. *-Dave

Yeah, but.... Hold a new filter up to a light and you can see light
thru the filter, similar to a lamp shade. That same filter after
being blown out 2-3x and as clean as you can get it, will not let any
light thru. This tells me dust is imbedded in the pores of the
filter. Obviously air is getting thru it somehow, but if the airflow
is impeded, is it pulling unfiltered air from around the edges? And
if the air/fuel ratio is out of whack, is there unburned fuel deposit
buildup happening in the engine? I don't know the answer to these
questions and that's why I asked.

KC

KC