Well Normk the comments about taking two mowers reminds of myself taking 3 chainsaws along with extra chains on to job sites. Never know when you going get one stuck and need to cut it out of a bind. Of course the third is just a spare but you never know what you run in to when cutting downed trees. I even had chop a couple saws out before I started carrying extra saws.
But as said it is wise to carry a spare on any project just saves time and headaches.
