Say Uncle writes in favor of the flame-thrower as an anti-zombie weapon.
NO! NO! NO!
To kill a zombie, you must destroy the brain. Fire does not do that until it burns through the skull. The freakin' skull, people! That's a long, long time. Meanwhile, you're staggering, burning undead pal has managed to set you on fire. And you're not as durable as a zombie.
Say Uncle also advocates the chainsaw under certain circumstances:
But, if you’re engaging zombies at close range, a chain saw is a much better weapon assuming you can somehow get into a position where the zombies are channeled in to you one at a time. A decapitated zombie is a friendly zombie.
I've used the bait-and-funnel technique myself, but never with a chainsaw. Consider this: (1) with a chainsaw, you need at least seven seconds with each zombie (2) the blood splatter of a chainsaw vastly increases the opportunity for contamination (3) using a chainsaw lets the zombie get within grabbing distance of you and (4) chainsaws are heavy. After twenty or so decapitations, your arms will be ready to drop.
Stick to repeating rifles. If you must use a melee weapon, choose a Shaolin spade. Or a sharp katana. Or even a baseball bat. Anything but a chainsaw, for crying out loud. That may work in the movies, but not in real life.