can anyone tell me what keeps the motor locked down when you go to reverse.that motor didn't come with tilt and trim from factory this is not the tiller handle stile the only thing i have found it has a trim assist witch is a cylinder with a plastic tube 1/4'' to a lever on the outside bracket .on the end of it was a piece of plastic that was broke.can anyone explain to me what keeps your motor locked down foward or reverse thanks for the help