Hi, I have a John Deere LT 170 V twin 16 hp, single carb. It sat for 3 years, I cleaned the carb, cleaned the fuel tank and it fired right up. I mowed with it and the next time I started it it would bog down, I pulled the choke out and it would run but not let the blades engage. I pulled the carb and cleaned it again. Now the only way it will start is by squirting gas into the carb, when that runs out it dies. I'm not getting any fuel out of the fuel pump at all. I'm stumped.