im building a mower and using a 17hp opposed twin. i have to rewire everything since the mower chassis i got had no wires at all. i put a new coil on the motor and the only way i can get it to run is by puttin fuel straight into the carb. im building a tank brace to see if i cant make the tank sit higher for better gravity flow but im not sure why it runs with only me putting fuel straight in the carb. any help would be appreciated