Hello all first post and a question. forgive my technical terms if there slightly wrong. ive recently purchased a rib with a new df90 on the back. with the engine fully lowered there are 6 indicator marks on the lower unit left hand side that as the engine lowers fall in line with the piece bolted to the transom. I'm guessing these are lower position indicators. with it fully lowered until the motor stops its not quite reaching the first indicator suggesting the engine has further it could go down. Is there a procedure to check or set this. ive trawled the web and not found anything conclusive. Cheers in advance. Dusty