the red lever is only for manual operation by you,turn it 180 then back when the motor fires up.the solenoid only will have power when the key is in the on position and pushed in,there is a rod in the solenoid that moves the diaphram in the enrichener when you choke it,the clicking sound you hear.when you move the red lever by hand it opens the diaphram and dumps fuel until you turn it back to the run position.fish eater is right the lakes are not very dusty..