Hi Jeff, I got a reply from the bloke selling the pulley bosses, they weigh 400 grams the same as the heavy boss weighs but without the extra weight of the pressed pulley. With the restricted decomp and the heavy boss there is no attempt to kickback so you can pull it with confidance that you are not going to break your fingers. I believe the problem is a cup starter is spinning it directly from the center and the PT is pulling from the center of the conrod/big end and I'm sure this is what is causing the extra load. This coupled with the way the motor is positioned on the base means to get an effective pull you pretty much have to pull it vertically.I have worked out how to start it with my right foot on the mower and heave vertically with every bit of strength I have, using my back to slingshot upwards to get it spinning fast enough to fire. I have heaps of the metal cord ring type I will swap one on the see if any difference is achieved. At least I know it can be started but it is at the utmost of my strength ability to get it going and I can still lift mowers up onto the bench so I still have some strength left
