1、Part Number: Replacing OEM numbers for reference are 369‑65021‑1, Replacement for Tohatsu 47‑16154‑3, replacement for Sierra 18‑3098. 2、Function: Neoprene impellers are used for marine water pumping, such as engine cooling, water transfer, wash down and bilge water pumping, suitable for fresh or sea water. 3、Impeller Size: The hydromotor impeller has 6 blades. Height is 14.30mm / 0.56in, external impeller overall diameter is 33.58mm / 1.32in, inner shaft insert diameter is 10.25mm / 0.4in. 4、High Performance: The flexible 6‑blade impeller goes through a rigorous quality process to ensure reliable, efficient and long lasting performance. 5、Recommendation: You should replace the flexible pump impeller at least once a year, or earlier depending on the engine duty. Be sure to bring a spare impeller with you before rowing. 6、Premium Material: Made of the highest quality nylon and neoprene, the impeller makes service and maintenance of the water pump easy. Item Type: Water Pump Impeller Material: Nylon + Rubber OEM: 369-65021-1, Replacement for Tohatsu 47-16154-3Other OE: Replacement for Sierra 18-3098 Quantity of Impeller Blades: 6Height: Approx. 14.30mm / 0.56in External Impeller Overall Diameter: Approx. 33.58mm / 1.32in Internal Shaft Insert Diameter: Approx. 10.25mm / 0.4in Applications: Replacement for Mariner 4-STROKE Carb: 2HP, 0R131842 and Up 2.5Hp, 0R131842 and Up 3.5HP, 0R131842 and Up Replacement for Mariner 2-STROKE: 4HP, 0T894439 and Up, 0P401000 and Up 5HP, 0T894439 and Up, 0P401000 and Up 4HP, 0G710613 THRU 0T894438, 0P017000 THRU 0P400999 5HP, 0P017000 THRU 0P400999, 0G710613 THRU 0T894438 Replacement for Mariner 2HP, 0T884302 THRU 0T894576 Replacement for Mariner 3.3HP, 2.5HP, 0G710613 THRU 0T894576 Replacement for Mariner 3.3HP, 2.5HP, 0P017000 THRU 0P400999 Replacement for Mariner 6HP, 5HP, 4HP, 4-STROKE, 0R000001 THRU 0R067089, 0P073456 THRU 0P400999 Replacement for Mariner 2HP, 2.5HP, 3.3HP, 0T894577 Up Replacement for Mariner 2.5HP, 3.3HP, 0P401000 Up Replacement for Mariner 6 5 4 (4-STROKE), 0R067090 Up, 0P401000 Up 1 x Water Pump Impeller