When moving parts from one motor to another on the early motors it’s
not uncommon to have to make some adjustments to get a replacement
part to fit. I suspect your issue is the underside of the magneto lever is
contacting the side covers. As you have several magneto levers with the
same result it indicates that you need to make and adjustment else
ware. You could remove some material from the magneto lever where
it contacts the magneto plate, remove some material from the underside
of the magneto lever, remove some material from the covers, or a
combination of.
Tubs
.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.