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Old 03-10-2020, 02:29 PM   #5
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,598
Quote:
Originally Posted by 10/10ths View Post
A mechanic that I trust on these machines told me that the manometer test is really useless.

The AOS can fail without warning.

The membrane is either good or it’s not.

Just R&R it every four years.

Cheers!
Strange, using this "useless test", we have correctly diagnosed and replaced many failing customer AOS units before they could fail catastrophically and potentially kill the engine...………...
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Last edited by JFP in PA; 03-10-2020 at 02:35 PM.
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