OK dad, I've been wihtout a lawnwower most of the summer. I want to take one last swipe at the acre with the push mower and then use the lawn sweep to clean it up. If I take the bag off the push mower what kind of trouble do you think I'll find if I try to chop up the very long 1'+ bent over grass and the leaves on top of it?
Until that point, continue mowing once a week. Only once you’ve noticed your grass isn’t growing, or frost/snow covers your lawn, should you stop cutting it for winter. If the winter is particularly mild and the grass continues to grow, then carry on mowing occasionally throughout
Okay, so if you are putting a lawn mower away for the winter, you should check the oil, rebalance and sharpen the blade, and at least rinse off all the dead grass and dirt after the engine has cooled down.
That's a good point, I was assuming a temperate climate, and wet leaves and grass will kill whatever is under it. If you live in a hotter, drier climate, the clippings will dry out on their own.
I've used a push mower on long grass like this before. It's easier if you have an attachment to blow the cut grass out the side, otherwise (depending on moisture, especially under leaves) you'll likely get things clumping up pretty bad.