Whirley Bird...if that parts view is correct for your engine then it's ball raced so won't have the shim washer. It seems there was an assumption made that you have a plain bearing engine and they're the only ones that need that shim (they don't use a split cone either).

What I'm curious about is if the engine feels free to turn (other than at the top of the stroke) without a prop and then gets hard to turn when the prop is put on and tightened. If so then there's a problem with bearing clearances in that tightening the prop forces the inner race hard back and binds the bearing. That's cause for a replacement engine. It's rare but tolerances can gang up to cause it.