Seen this happen a few times since I started work on outboards, (1973). the failures usually don't care if they are OEM or Aftermarket. I have Used Both & have no opinion as to which is better now. Just nees to be sure that impeler is lubed liberally at installation & to minimize the dry " engine starts & simple spinovers". QC is just not what it used to be.

Lawrence Thornton
South Carolina Mellon Belly Associate.