EPA-Approved Primer Bulb, 5/16" Hose | West Marine
MerCruiser Primer Bulb - Fits 5/16" & 3/8" I.D. Hose
Marine Engine Depot. Sierra Medium Universal 5/16" Primer Bulb Assembly 18-8004EP-1
Amazon.com: 8mm 5/16 Black Primer Bulb Rubber Fuel Pump Transfer Vacuum Fuel Hand Primer Gasoline Petrol Diesel Pump for Marine Boat Accessories : Automotive
Scepter EPA/CARB Primer Bulb - 5/16 in. Hose Barbs 10542 - The Home Depot
Attwood 5/16' Universal Primer Bulb | 1032600 | Pep Boys
Mercury Marine Primer Bulb - Fits 5/16 & 3/8 Inner Diameter - Includes Hose Clamps - 8M0061876 | PartsVu