Johnson Pump impeller for F7 pump. For cooling water.<br /><br />• impeller 09-1028BT-1 (BT-1 replaces B)<br />• for F7 pump<br />• replaces Jabsco no.: 17937-0001<br />• outer Ø: 65.0 mm (U)<br />• inner Ø: grooved (A)<br />• length: 50.2 mm (S)<br />• material: MC97/EPDM rubber compound