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has anyone had any experience modify ears, having some customers telling us they are cutting ears off where the curve to make transition to rotor, I have a hard time beleiving this won't slug rotor, any thoughts would be appreciated, scott.
 

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Factory built ones are called "Marlin impellers". You can see pics and prices at various places. I think even Abilene machine carries them.

I cut my own down years ago. I've ran them in short stems like clover seed, and long stems like tall fescue. The cut down impellers may or may not work in wet stuff like rice, I cant answer that, but I remember way back when they first went from 4 impellers on the 80s to the 2 impellers, everyone thought the same thing. OMG, the rotor will slug!


Here's a link rto some old pics that may help.
http://talk.newagtalk.com/forums/thread-view.asp?tid=29756&mid=203489#M203489
 

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I put Marlin impeller blades on a 1660 and ran for 3 seasons with great results in wheat, barley, dry beans, and corn. The only condition I had problems was in short wheat or barley. The crop would seem to stall behind feeder chain and then slug into rotor. Other than that, great feeding in all other coditions and a lot less rotor growl and hp requirements.
 
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