4 blades probably would help it.
Thing is what sort of grass are you cutting??
If its reasonable length and goes in under the front of the mower OK whats on it will do the job. An extra 2 blades would probably help.
If its real long nasty stuff i doubt that the extra 2 blades would make any difference.
If it were a catcher mower i would say go with it. A 2 blade victa with a 5hp quantum on it even struggles to throw wet grass into the catcher. 4 blades helps. Not that you are meant to mow long nasty wet grass and expect a full catcher and lawn like appearance after you are finished.
Im actually wondering if the 4 blade disc will clear the handle bolts (if they are nut down) on a full crank ute base. The regular PT dics doesnt.
Bob.
