Hi Robert,

A quick check doesn't seem to turn-up much on the "646 Case". I did find a listing on the "MCCK Onan". The Onan,1961-1987, uses a Prestolite starter. Early number MBG4134, later number MBG4144, Lester# 5488, Wilson part# 91-06-1895, and Dixie part... Login to read more.