The throttle on my 50 hp Mercury outboard is getting very stiff. The plastic is also starting to crack and the handle itself is very loose. The actual throttle lever moves 3 inches or so from one side to another (not up and down with the throttle, think side to side). I think its about time for a replacement. Where is the best place to source a new box? My initial though would be to leave the cables and just insert them into the new unit. I am open to opinions on past replacement methods. Thanks for the help. Photos below for reference of what box I need. Anyone with a thread about their personal replacement - a link would be awesome.