Why are the dry and wet sides uncoupling?

Cause 1 - Bound or Tight Drive Shaft
Cause 2 - Improperly Installed Pin Spacer
Cause 3 - Magnet Rubbing against Gasket on 3/4″ Tanks

http://ecotechmarine.com/faq/uncoupling-dry-wet-side/

HTH Kristy.

Christopher