Johnson Pump F7 MC97 Impeller Kit 2.56″SPX Flow Johnson Pump marine brand impellers are developed and manufactured for maximum flow and long life. Replaces Jabsco No 17937-0001.Features:Includes gasket, o-ring, and 7gms impeller lubricantStable pressure delivery over timeSignificantly longer service lifeExcellent self-priming capabilityMinimized swellingMinimized failures due to fatigueCorrect impeller dimensionsCorrect cooling flow & sufficient cooling directly at start upSpecifications:Material: MC97 for coolingOuter diameter: 2.56″Inner diameter: 8 splinesWidth: 1.98″Application:Mercury Marine 4Cyl, 6Cyl enginesVolvo PentaYanmarKohler