Johnson Pump F4 MC97 Impeller Kit 2.00"SPX Flow Johnson Pump marine brand impellers are developed and manufactured for maximum flow and long life. Replaces Jabsco No 18653-001.Features: Includes o-ring, gasket, and 7gms impeller lubricant; Stable pressure delivery over time; Significantly longer service life; Excellent self-priming capability; Minimized swelling; Minimized failures due to fatigue; Correct impeller dimensions; Correct cooling flow & sufficient cooling directly at start up; Specifications: Material: MC97 for cooling; Outer diameter: 2.00"; Inner diameter: 6 splines; Width: 0.87"; Application: Westerbeke - 10 kW and up; Yanmar from model year 97 - 3GMF, 2 GM, 3 GM;