My nephew had his blaster tipped on the back for a while(he said gas tank was empty) making skid plates,,now he said it wont start,it puffs some white smoke. Can the oil from the case get in the motor if you do this...Also,the oil tank is unhooked,,the small line is plugged off,,but he took the tank off and said that there was a large line that went to the block,he also plugged this line,,will this hurt anything. He has been mixing the oil w/ gas. What is the large line going to the block.