Amazon Secure Payment System Continue shopping “Johnson Pumps of America 28552 Marine Pump Cartridge for 500 GPH Motor” has been added to your cart. Product Price Quantity Subtotal × Shoreline Marine Plumbing Kit 3/4" X 5' Hose $7.92 Shoreline Marine Plumbing Kit 3/4" X 5' Hose quantity $7.92 × Johnson Pumps of America 28552 Marine Pump Cartridge for 500 GPH Motor $21.61 Johnson Pumps of America 28552 Marine Pump Cartridge for 500 GPH Motor quantity $21.61 Coupon: Apply coupon Update cart Cart totals Subtotal $29.53 Total $29.53 Proceed to checkout