The 6 bolts holding the sump plate on don't use washers. They're not missing, they were never there .....
http://www.boats.net/parts/search/Y...OIL PUMP XS650D - E - E006501- - F/parts.html
http://www.boats.net/parts/search/Y...OIL PUMP XS650D - E - E006501- - F/parts.html