Yanmar impeller pump wear plate with part number 129198-42520. This plate is used inside the seawater / impeller pump and gives the impeller a smooth surface to run against. Fits Yanmar engines including: 3JH25A and 3JH30A. This wear plate is part of the raw water cooling system. It is often checked or replaced when servicing the impeller pump, especially if the surface is scratched, worn or corroded.
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