Amazon Secure Payment System Continue shopping “Idle Adjustment Knob & Retaining Ring – 9.9 & 15 hp – 1974 to 1985 – Johnson Evinrude – OMC 387272” has been added to your cart. Product Price Quantity Subtotal × OEM Evinrude Johnson BRP Fuel Filter/Water Separator Kit, 25 Micron - 174176 $56.66 OEM Evinrude Johnson BRP Fuel Filter/Water Separator Kit, 25 Micron - 174176 quantity $56.66 × Evinrude Johnson Trim Tab 338742 $44.95 Evinrude Johnson Trim Tab 338742 quantity $44.95 × Idle Adjustment Knob & Retaining Ring - 9.9 & 15 hp - 1974 to 1985 - Johnson Evinrude - OMC 387272 $25.82 Idle Adjustment Knob & Retaining Ring - 9.9 & 15 hp - 1974 to 1985 - Johnson Evinrude - OMC 387272 quantity $25.82 Coupon: Apply coupon Update cart Cart totals Subtotal $127.43 Total $127.43 Proceed to checkout