I think there is some arcane reference to the engine section from the fuel pipe section
see the strange reference to fig no 0202XX below. I’m not sure what that really means but I started looking into the sections of parts in the 2### section and found that part.
View attachment 113889
since it starts you can run it without the solenoid as long as you know how to manually shut it off.
I’m glad I was able to help you locate the solenoid