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noting the rotational direction of the vanes
2 x O-Ring (25-21836)
Please check your specific model and year against the lists below to ensure correct fitment
What does "bi-directional" mean and why is it important
What does "Digitally Signed Firmware" (DS) mean
Water Pump Kit – Fits MerCruiser Alpha, Bravo & TRS (Replaces 46-807151A14, 807151A7) 160-430HP noting the rotational direction ofProduct Details This Sierra 18 3150 Water Pump Kit Fits MerCruiser Alpha, Bravo & TRS is a complete assembly designed for MerCruiser Alpha engines with freshwater cooling (FWC), all Bravo I II III and TRS sterndrives, and various inboard marine engines. It is engineered for models that utilize a plastic, one piece body sea water pump. This kit serves as a direct replacement for MerCruiser part numbers 46 807151A14 and 46 807151A7, as well as GLM 12088
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