Amazon Secure Payment System Continue shopping “1990 OMC Cobra Stern Drives Service Manual 507878” has been added to your cart. Product Price Quantity Subtotal × Gimbal Bearing Kit for Mercruiser Alpha One and Alpha Gen 2 Replaces 30-879194A01, 30-862540A3 or 30-60794A4 $47.95 Gimbal Bearing Kit for Mercruiser Alpha One and Alpha Gen 2 Replaces 30-879194A01, 30-862540A3 or 30-60794A4 quantity $47.95 × 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 $112.95 Total $112.95 Proceed to checkout