I picked up an Evinrude 18hp. 95 pounds even compression. Has original coils and cracked up. Now, I own 3 QD-20/21 10hp motors. I rebuilt the entire magneto that is not in use at all. Are these swappable between QD and FD motors? I know coil and points are but will the whole plate just swap and bolt on? Pls let me know. I do not have any part lists handy to cross ref. Thanks.