Had boat for 3 months (1995 Reinell with 4.3 GL 190 hp Volvo Penta). Filled up at floating gas staition on lake, boat ran well. Next day, wouldn't start. Marina charged $1,000 to drain tank, rebuild carb and change impeller. Ran great next weekend. Now won't start. Have 1/2 tank gas, good spark, fuel filter has gas, carb is empty. After pumping the throttle, no gas is getting in carb. When gas is poured into the carb, she starts then dies after gas is burned up. Do you think it is a fuel pump, clogged line or ??. Previous boat was an outboard, don't know much about i/o. Any help or advise will be appreciated.