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OK, so you found some more top end power…Again, not at all familiar with this engine series, but it looked like the standard OMC universal magneto set up, I always thought there was only one set of points for this set up…The rubbing blocks are probably worn down on your original points accounting for the difference. I would appreciate it if Lloyd or someone else could chime in on this…
Seems like your powerhead is in rough shape for sure, but I’m betting you can get it idling better than it was in the video. Maybe someone can post some pictures of a carb showing the areas that need to be checked out….Sure seems like the low speed circuit in your carb is blocked somewhere. I would hate to see you replace that powerhead only to have the carb problem carry over to the new powerhead….I realize your engine will never idle “great” with the worn powerhead, but I’m betting it is capable more than your video shows…
These engines were great runners, hope to get some experience with them someday…