I have just purchased a new rotavator and like a lot of chinese imported stuff the instructions are translated and poor, so much so that they don't tell you which way round to fit the tines onto the drive shaft.
If I have them one way, the tines curve backwards and would "slice" into the soil. If fitted the other way they would "hook" into the soil and I am not sure which way is best, I went up to the plot today to run the engine for the first time but it was too wet to give it a try in the soil.
I presume one way will be more efficient or less violent than the other. does anyone have their machine to hand that could look.