hello, i have eventually found a number on the inside of the lid of my out board ISZZ250, is thi the serial number or just a part number? i am trying to find the model and year so i can locate a manual, its a 50hp suzuki, thank for your time! 
other numbers found in the engine are 277277, 32900-9330, 070000-0331
other numbers found in the engine are 277277, 32900-9330, 070000-0331