I do not know if he is using the omc coil parts or not. As I understand it , you have to send him the $s and your old coils as a core charge. Like FR said no impeller air cooled, The best part is, I found this in the garbage some 25-30 years ago . It was my first outboard, I got it home , sprayed some penetrating oil in the cylinder , got it to turn , some fresh gas , an presto .. had it on my canoe . Its been with me through 3 wives, several living quarters, and a few canoes. Still runs great. I had some spare time last week ,[waiting for parts for the other outboards ] and heard it calling me, for some new paint,decals, tuneup.