Driver bushings
#6
Yes the model uses the same construction as the larger engines, but that is a concern, because the frame is much thinner.

We're talking 40+? year old Zamak, which is tougher than most white metals but has had time to crystallize, so I would urge caution with any applied force.

If pressing in shim-stock, I'd cut a notch in some scrap wood to hold the journals while pushing on them rather than risking the frame.

You could easily sweat them with solder in a wood fixture and forget extra tabs.

Dan M.
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