Trying to identify correct impellers for 671 dd.
Pulled impeller out, it has 9 vane, 2.5" long, 1" shaft, vanes all broke so no diameter. it has # 18021-0001 "jabsco" on it.
Hatteras manual has pump # 17437 and impeller # 6303-0001
Detroit diesel shows the impeller should be # 17935, 12 vanes...