I am having the same problem with my 240. When hot it does not want to fire up after sitting for 10 minutes or so unless you crank for about 5 seconds then stop and try again. Will fire right up the second time. I have replaced all the filters etc. If you crank for 20 seconds or so it will start but that seems to be excessive wear on the starter to me. Better to crank for 5 seconds, stop, and then crank again which will start without fail. You may want to try this.