is this carb a remanufactured carb? i bought this carb back in may of 06 ... springfield oh swap meet ... its a vac. sec carb 600 cfm and ive had problems since ive bought it ... the guy i bought it from put the cool looking 4150 float bowls on it.... looked brand new out of box... now its causing my motor fits... so im going to my other 600 carb to see if that changes anything... does advance or autozone still sell kendall motor oil ???