Twin cylinder gear case also requires a steel shim and bronze spacer
Take note of order steel shim is between bronze spacer and bronze bushing and the bronze spacer is atop the pinion gear. The easy
way to get it all together is to have gear case in hand so it can be
turned upside down, insert drive shaft just far enough to hold shim
and spacer, then drop pinion gear in, Then hold gear case open end
down while manipulating drive shaft and gear with fingers until
things line up and drive shaft slips into place,
There are other ways to do it, but, take it from a lazy man, the other
ways are less fun.
edit
Only the 14/19 gear sets require these shims ans spacer. Some pinion
gears have a tall hub, shim and spacer not required. However, the
shims on prop shaft are still needed.
Gear case for a single cylinder model have a 12/22 gear set and do
not require shims or spacer.
