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What size spring pin/s are needed for a Sears 536.887993 snowblower?

The impeller does not spin when the auger blade spins (although it spins freely by hand). I heard that either spring pin/s or roll pin/s are needed to attach the impeller to the shaft that goes through the center of it. I need to know which of the two it is and the size. Note the owners manual does not identify these parts in the schematics. Again, I am referring to the impeller, not the auger blades. The shear pins are fine thus they spin as they should.

Electric Snowblowers
1 Answer from this member:
Manage My Life
by Manage My Life
January 4th, 2010
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