You said one side was hot...old school method, warmed up and fast idling...touch the top of the head where it meets the block, it should not be scalding. Port a few degrees cooler but not noticable to the human hand. Port side head have a two wire sensor? Tan wire and a white wire? Could be...
I'm confused, tach shows 10k....but you run at 7200 RPM's at wot? I hope I'm wrong...please explain.
Also, if your rectifier is cooked, you won't see 16 volts. You will see whatever the battery voltage is.
Yeah, I run 750 RPM's in gear, on the water underload....in the backyard on muffs I'm at 1100. Not sure how the others can be so low but that's been my experience. If your compression is fine than I'm guessing you still didn't get your carbs clean enough. When the carbs were off the motor, did...
Compression check is in order....and so are temp readings. IR guns are inexpensive. Things could be shutting down when they get warm so take a timing light with you next time and see if your still sparking.
