not sure what the diameter is, but it should be a 50oz counterbalance flywheel.
your starter has a small amount of play in it, see if you can loosen it and get the teeth closer to the flywheel teeth.
also, what is "ruringed "
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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