Friend has a merc 50 he is wanting to convert to a tiller steered motor and I know i have seen this on ebay but can't remember what it is called. There is a power box maybe it is called that had a key operated on and off switch to start and kill the engine does anyone knw of a part number for this and about how much does this cost? This for a Mercury 50 hp long shaft it is a 2002 model with power trim. I think there is also a remote power trim you can put on this motor as well so you can trim your motor up or down do you know the part number or name of this part??