Heres with timing locked, before uploading the custom timing map I made. I could have leaned it down , but the idle speed would have had to been around 1100-1200rpm to keep her running. https://www.youtube.com/watch?v=O-fTA0JA36Q&feature=youtu.be

Later that day, mufflers installed, timing map uploaded, carbs fine tuned. https://www.youtube.com/watch?v=2nHvNQD13o4

MT thanks

The power valve opening, won't affect the idle. A power valve opening, simply adds fuel to the main well. The same well, that the jets pass fuel thru. It be like swapping from 82 jets, to 94 jets, no effect on the idle.

Being able to idle at a lower timing setting in nuetral, and higher timing setting in gear, makes for a much larger window of tuning your idle setup.

So, when you backed the idle timing down to 10*, and she was at 850rpm, she'd stall when putting in gear. What if, you were to try that again..back it down to 850rpm with 10*, and back the mix screws out slowly, till it just begins to surge., then, crack the throttle blades just enough, to get it idling at 950-1000rpm. Ill bet the situation, will be much better.

What kind of advance setup do you have? Weights and springs?

What`s going on there at :42??

MT thanks for posting the videos very cool. So if I start to back them out at 850 @ 10* it will take off and surge as soon as I touch the first idle air bleed an 1/8 of a turn. It is way sensitive big time. This is the issue Ive been having with it. There is no curve the distributors are locked. So when I back it down to ten thats all the timing all the way as you would know!

MT im not a rocket scientist (did paint all the parts on the Hubble how ever) but that sounds like way more than 850 RPMs in the second video?

It was around 1000-1050rpm in that video if I recall. once i got boat in the water, I was able to turn it down to about 950.

I think this might have been best idle at 26*
https://www.youtube.com/watch?v=rwE6eEf92p8

At 16* I think we were able to get a little lower rpm and still idle nice and better AFR`s but in the boat I had to richen it up a bit to mid 12`s and add have it idle at 900.

https://www.youtube.com/watch?v=hDqAawtfF0g