Johnson 40hp model j40vls1b

[waterworld58]

Hi All,

Have a 40hp Johnson 2 stroke 2000 year model that is pushing gas into the oil injection tank . This is when the boat is parked in driveway. Doesn`t do it when i loosen the gas cap on 6 gallon tank. Other wise the boat runs fine on the water. Is this a venting problem?

Thanks,