Guys, I'm looking at all the threads on the AMF MR12 II but can't find info on what you guys are setting the cracking inches to. As well -
I'm seeing that it likes 1 3/4 inches or nothing. By nothing I mean that If I adjust the lever height locknut inward to try to get a lower cracking inch below 1 3/4, it freeflows as I tighten down the case ring. WTH? Interesting thing seen is that just by looking at the bottom box, I can see that its not square to the centerline. I put the bottom box on my ground flat surface, outboard side down - it' aint flat!
Point 2 is that the other MR12 II I have, does have a nice flat bottom box OD but that one doesn't like a cracking inch below 1 3/4 either. It settled on 1 3/4 inch and is very happy there. Any attempt to make it more sensitive, - freeflow.
My question is - what do you guys set the cracking to in inches of water on these MR 12 II's - ?
**I have the OEM diaphragms in there - not the Abyss silicone . .