I just got a boat that has a 1980 40hp mercury outboard on it,the tilt on the outboard doesn't lock.The guy i bought the boat from said "now if you hit something the motor will just flip up".I want to get it working properly,the tilt is a manual one so there must of been some kind of lever on the outboard at one time,could some one sent some pics of the tilt locking mechanism or diagram of it,the outboard is a 1980 40hp mercury ......thanx