I changed my inboard to a outboard .The 250hp (2001) engine runs fine (turz)2 stroke.Now my problem is I need a 2 stroke tach.as my present one only has a 4,6,8 on the back of it and measures 3 and 3/4,and I need one that has a 12 hook up.Will a 1991 yamaha multifunction tach. work using a 703 control? Thanks.any other ideas welcome.