I don’t know anything about them. Not a motor with a strong collector interest. There are later coils the can be adapted to work in earlier motors but can’t say if they could be used in yours. Here are 2 links https://www.aomci.org/forums/topic/elto-speedster-1949/ and https://www.aomci.org/forums/topic/1949-elto-sportster-5hp-pros-and-cons/
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
