Sierra 18-3506-1 Circulating Pump
Sierra 18-3506-1 Circulating Pump, Sierra 18-3506-1 Circulating PumpSierra replacement circulating pump for V6 Sterndrives. All Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. For V6 MCM (s/n 1A063240 & up); Newer 4.3L w/o water bypass hole; Interchangeable with: Mercruiser Stern Drive; 46-879194366; 46-879194401; 46-8M0094406; 46-8M6005225; Volvo Penta; 21124846;