Hi Gary, this topic and need for Lauson information has come up here in the past. You have one of the more rare Lauson twins, the full F=N=R gear shift model. Someone here has a link to the manuals for that motor, hopefully they will chime in. As for the ignition. It seems that many (most) of these air-cooled Lausons are found with bad coils. I know that a workable substitute is the John Deere Pony Motor coil. A member here had successfully substituted that coil. The original style coils are available buy $$$, look for Maytag model 72 Twin Eissemann coils on e-bay.
Is your motor complete? Are the lower cowl shrouds present? these covers, often missing are critical to proper air flow and motor cooling.
The F=N= R transmission on that motor is a rather complicated assembly, as is all the linkage to carb and shift lever. All easily gotten out of wack. proceed with caution and have a manual at hand.
Joe
