The yellow impellers were a little soft for some applications. I have personally had to put the black impellers back into pumps here at the shop especially for draining the center bags because of the amount of suction that is required to get the pumps primed.
The green impellers seem to be working well for everyone I have sold them to this season. I called Jabsco to inquire about them this winter. They said besides being a better impeller for ballast applications they also have dramatically increased run dry protection with the new compound. We have found that when adding the Mastercraft X Star or X2 additional ballast systems they are a must.
I wish I could say Wakemakers
is the cheapest place to pick them up but we are not, although we do keep a healthy amount in stock. it looks like fairfieldsupply.com has them at the best price but they are sold out.