Al Bundy wrote:
Thanks for the laugh Bob. That was a good one.

No, seriously. I used to bring home mowers from the dump, get them
running, and sell them. I had mowers that wouldn't run without the
filter. By "proper air flow" I didn't mean sufficient air flow, but
correct air flow. I think that I read an explanation of this somewhere,
but can't remember the logic. My memory is full and new stuff pushes
out the old to make room. G

Bob