NormK,
I would suggest that's balance and stability added by the FC. Without that, in a way, you could refer to the PT's as more "flimsy", with nothing to hold them on the other side. This would give rise to flex, shift, etc. Though it should be nominal, and I personally find the PT's good engines.
I must confess, I've never worked on a FC. Now, with the PT's more difficult to pull-start, that could have something to do with the weight under the mower, coupled with the fact that it's a HC and doesn't have anything on the other side to hold it stable. My thoughts are that, while you may need additional force to start the PT, you shouldn't need additional speed. So you need to compensate for the weight of the components under the 600 by putting your weight behind the pull, but the pull shouldn't be fast. If the pull is fast, coupled with that additional weight, could that be causing the decompressor to be pushed closed before the engine fires? Could the solution be to try to pull it slower but with more force/consistency?
Gizmo,
I've never worked on anything but PT's, maybe NormK or someone else could chime in here?
Does the PT need the boss/carrier/blades to function normally? Will it run without them?
