After starting this thread back in October, I finally was able to get the injector part number. It's a 10R1265 and the engine serial number prefix is 4CR. Skara2007's starting problems are identical to this engine. Customer spent 3 hours getting it started on Friday so he could grind today, temperature was in the low 50*F. The north east wind started blowing yesterday, temperature is in the high 20*F and it started this morning. It's only after sitting for more than a week or so that it does not want to start.