That neighbor is a keeper!

Let's recap, shall we?

On 9/5, your neighbors gave you rice krispy treats.
On 9/6 they mowed your lawn.
On 9/11 they mowed your lawn again.

I don't think it really matters what brand of mower you bought, does it? Why don't you just give them the manual? Hell! Just give'em your GD new lawnmower!

Or...................
was mowing your lawn just part of the devious plan where they hid a murdered body in your back yard? Perhaps the Krispy Treats had a sedative that knocked you out during the digging phase?
Or....................
should I just put down that Boris Karloff compendium that I picked up at a yard sale?

How are you going to repay his kindness? You don't even make beer!

Well, Ken can show him his hat collection? Maybe even let him try on a few?

"Here, this one should keep you nice and shaded next time you come over and mow. Too bad you aren't a neighbor to my friend Peter. He makes his own beer. I bet he'd let you look at a bottle if you mowed his lawn."

Late to the lawn party but I'll add I own a Craftsman mower with the Honda motor and have had no problems for 7 years now.