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Simplicity mower deck small roller purpose


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That's the correct setup.  

Those inner rollers are anti-scalp rollers.  If you're  mowing up a somewhat steep hill with a quick transition to flat ground at the top, the anti-scalp rollers will lift the  back of the deck (before the main rollers) and prevent scalping.  They'll also prevent scalping in other situations (high spot in center).  


Edited by PhanDad
Revised explanation, had it backwards
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