I can't remember when the LOM starts to activate the vacuum port, but isn't it around this? It can be that once you fix the fuel mix, you may have to adjust your timing.
It is also possible to have the timing too far advanced which would increase idle speed. I remember this happening to me a few years ago. I would adjust the carb, timing would be off, then adjust timing and carb would be off again.
Not saying that's it...but it may be worth dialing the timing back to see, especially if you aren't 100% sure your timing mark is spot on.
It is also possible to have the timing too far advanced which would increase idle speed. I remember this happening to me a few years ago. I would adjust the carb, timing would be off, then adjust timing and carb would be off again.
Not saying that's it...but it may be worth dialing the timing back to see, especially if you aren't 100% sure your timing mark is spot on.