I just rebuilt my Kohler M14 and am afraid that I may have not installed the thrust washer on the governor gear. I have the nylon governor gear, and when I removed that part I did not see the washer (I am guessing that it probably was stuck to the block, and fell out at a later time). I put everything back together as I had disassembled it, and actually ran the engine for a while today, obviously missing the washer because I do not recall seeing it. I only (and accidentally) ran across a reference to the washer just now while looking up governor adjustment procedures. My question: How soon do I need to install a new washer? It seems to me that the wearing of the nylon gear on the blcok would be a long-term problem, giving me time to continue mowing while waiting for the part to arrive. Is this a wrong assumption?