Genuine Parsun o-ring b, cover T40-04060003 is compatible with Yamaha 93210-74MG5
Delivery time is normally about one month
2 pieces "o-ring b, cover T40-04060003" are being used on the page "F50/F60 lower casing and drive 1"
They are sold one by one, if you need a complete set you need to buy multiple.