My 94 Yamaha Pro V 150HP has stop automatically filling the oil tank mounted on the engine from the oil tank located in bilge area. I can fill the tank on the motor manually and run with no problems but I assume the pump which transfer oil from the reserve 10.5 liter tank to the pint sized tank on the motor has expired. Can someone tell me if there may be some other issue with the pumping system, troubleshooting procedures to confirm the problem or an approximate cost to repair or replace the oil pump. Any help will be greatly appreciated. Thanks guys.