Small Engines (Lawn Mowers, etc.): where to obtain a replacement, craftsman model, first three digits

Question
We broke the drive belt on our Craftman Kohler Pro 16 OHV mower, have a terrible time trying to locate one.  Of course when we find one we will need to know how to install it also.

Model #9172710c    6 speed   42" cut

Serial #040599d004290

Answer
sue
The model # 9172710c is missing a few numbers
0 results found for model # 9172710c


Get the whole number
Include every digit, even if some are sized or styled differently, Kenmore and Craftsman model numbers may have the first three digits separated by a period.
Watch out for characters that look alike
Take a closer look at the lowercase "I" and numeral "1", letter "S" and numeral "5", and letter "O" and numeral "0"