Has anybody had slight difficulty with the first start of the day with the 170Cdi? What I've noticed is that on the first start it'll run off the prime and then quit, as if it has slight trouble drawing fuel. After a few attempts it will start and from then on it has no problems and runs well. I prime by giving a few squirts of fuel into the carb, and a few seconds spin on the starter before switching on the ignition. Any ideas?