I am also having MVP50s placed in my Skymaster (337A). They are currently in configuration and I'm having trouble finding a answer to a question they are asking. I've been looking through my manuals.
Maybe one of you has the answer to this question. On the suction gauge, there are two little red suction cups. When the suction drop below a level, the suction cups pop out indicating there is a vacuum failure. Does anyone know what that level is? I saw a post in the forum that at 1200 rpm, it should be 3.5 or above. My service manual talks about adjusting the relief valve and it should be 4.8 at 1900 rpm.
Anyone have a more definitive answer?
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