In this ignition system moving the magneto
lever back and forth changes when the plug
fires as related to the position of the piston.
Before TDC – TDC – After TDC – depending
on the lever’s position so the timing is always
changing as you run the motor.
The only fix timing setting is having the points
open just as the polarity of the magnet changes
(usually from North to South) as it passes over
the coil. The factory point gap setting is meant
to get you close enough in motors when you
don’t have a timing tool or no tool was ever
available.
When the points close isn’t relevant.
Tubs.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.