Guys read the post he did that. Also Merc's have a pump in the drive like an outboard. I have actualy never done one because I have always had Volvo drives. Volvo's only have a pump on the engine.

Impellers last 4-5 years, unless you run them dry or in silt.

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1969 280SE
2027 Ram 1500
2026 Genesis GV70
2007 Tiara 3200
1988 Egg Harbor 37
1981 Boston Whaler 17