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| fsh2liv |
 Jun 21 2026, 06:23 PM
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#1
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Newbie  Group: Members Posts: 30 Joined: 22-November 13 From: Colorado Member No.: 16,687 Region Association: Rocky Mountains  |
Is this normal? (The hole). From a '73 1.7 L . Part # 022 906 051E
 Thanks! |
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| Ron914 |
Jun 21 2026, 06:48 PM
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#2
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Senior Member Group: Members Posts: 529 Joined: 19-April 22 From: Huntington Beach,Ca Member No.: 26,487 Region Association: Southern California 
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QUOTE(fsh2liv @ Jun 21 2026, 07:23 PM)  Is this normal? (The hole) Thanks! Here's a photo of mine before I rebuilt it . Mine is a 043 of a 76 2.0L I believe that is the new adjustable load stop and someone refilled it with epoxy after they got it adjusted where they waned it .  |
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| JeffBowlsby |
Jun 22 2026, 06:40 AM
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#3
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,288 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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The amber epoxy on both of the photos above indicates original factory epoxy. The case rivets are original factory rivets, another indication these two MPSs have not been opened.
Internal to the MPS is an inside center adjustment screw, and inside outer adjustment screw, and an outer WOT stop screw (visible through the epoxy). The drilled hole in the fsh2liv photo, is a common attempt by some to access the inside center adjustment screw, without disturbing the WOT stop. Problem is the inside center adjustment screw and the inside outer adjustment screw often move together, when they are not independently held while adjusting the other. The adjustment tool allows holding and adjusting both inside adjustment screws independently, but that drilled hole is not wide enough to allow the tool to be inserted, it would only accommodate a small screwdriver to reach the inside center screw. |
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| fsh2liv |
Jun 22 2026, 07:40 AM
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#4
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Newbie Group: Members Posts: 30 Joined: 22-November 13 From: Colorado Member No.: 16,687 Region Association: Rocky Mountains |
QUOTE(JeffBowlsby @ Jun 22 2026, 04:40 AM) The amber epoxy on both of the photos above indicates original factory epoxy. The case rivets are original factory rivets, another indication these two MPSs have not been opened. Internal to the MPS is an inside center adjustment screw, and inside outer adjustment screw, and an outer WOT stop screw (visible through the epoxy). The drilled hole in the fsh2liv photo, is a common attempt by some to access the inside center adjustment screw, without disturbing the WOT stop. Problem is the inside center adjustment screw and the inside outer adjustment screw often move together, when they are not independently held while adjusting the other. The adjustment tool allows holding and adjusting both inside adjustment screws independently, but that drilled hole is not wide enough to allow the tool to be inserted, it would only accommodate a small screwdriver to reach the inside center screw. At this point I will confirm vacuum status. This MPS was in a box with the complete FI set up. The PO converted to carbs. Don't know exactly why. I am going through everything and plan to unload it to someone here. Thank you both for your comments! |
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| JeffBowlsby |
Jun 22 2026, 09:01 AM
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#5
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,288 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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If it holds steady vacuum it can be recalibrated. If it does not hold steady vacuum let me know, I may be interested in it as a core to rebuild if it is an 043 or 037 porsche part number. The indicated 51E part number is the bosch number.
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