Amazon Secure Payment System Continue shopping “1990 OMC Cobra Stern Drives Service Manual 507878” has been added to your cart. Product Price Quantity Subtotal × Gasket, OMC 306201 $5.19 Gasket, OMC 306201 quantity $5.19 × 1990 OMC Cobra Stern Drives Service Manual 507878 $65.00 1990 OMC Cobra Stern Drives Service Manual 507878 quantity $65.00 Coupon: Apply coupon Update cart Cart totals Subtotal $70.19 Total $70.19 Proceed to checkout