Outboard Water Pump Impeller. Water Pump Impeller. Rubber Impeller Size Information 4 stroke outboard motors 8hp /9.9hp (2004 &prior) ,15hp (2005 &prior) ,all with standard gearcase. 2 stroke 2 cylinders outboard motors: 6hp, 8hp, 9.9hp, 10hp and 15HP (USA 0A197112 &above, BEL 9461526&above).
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