6055 attenuation disk and bushing question

[pgammon]

When I remove the old disk, is there only one piece or two? It almost looks as if there is a second piece in the bottom. Thanks for the help.

 

[rvitko]

There were 4 build styles, a white disk and stainless steel disk was the oldest, this evolved to white or stainless steel disk with a thin black disk on top, then one or two thin black disks and then a single thicker black disk. If the center is raised, there is likely another disk down there, if it is flat with the cross ribs that reinforce the center hole, it is likely you got it all.

 

[pgammon]

New black disk then the blue attenuation disk behind the drive unit correct? Sorry to be a moron!

 

[rvitko]

Other way around, the base of the prop should rub on the hard black plastic, the blue rubber is essentially a shock absorber at the very bottom.