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need to replace the old blade with a new sharpened one and don't think I have the order correct--Lawn-boy power mulcher, silver series 4.5 hp
model 10202
ie: from top down:

1.sharpend blade ?
2. green plate (mulcher??)
3. tighten bolt?

Part numbers. Blade #612543-03. Mulch fan #99-6351-03. Nut #603164.