MF, they come from the factory with victa green tension washers under the bolt heads.
if you look around ebay you will find 100x Blade Washers for $16 ish - meaning it only adds $1 for each mower
All the allen key does is allow you to easily hole it true while you do up the nut (or maybe a backup if someone rounds the d shaped hole)
It does wear the bolts out in the long run - i was looking at a masport one the other day where they forgot the tension washer and it had chewed 1/3 way through the bolt
Main danger is the fright you can get when you shut it down and hear "clonk"
Last edited by Tyler; 31/05/23 09:05 PM.