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willysmjeeps.com :: View topic - Fuel pump primer lever - no fuel up to carb
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Fuel pump primer lever - no fuel up to carb

 
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JeepdaddyRC
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Joined: Jan 10, 2020
Posts: 170
PostPosted: Mon Feb 08, 2021 9:44 am    Post subject: Fuel pump primer lever - no fuel up to carb Reply with quote
Early 1952 M38A1. Appears to be original military fuel/vacuum pump.
Fuel pump provides 4 psi (at cranking speed with spark plugs removed) at pump outlet fitting.
However, no fuel exits the top carb fitting when using fuel pump priming lever to fill float bowl.
Why no fuel up to carb when using lever?
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wesk
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Joined: Apr 04, 2005
Posts: 16250
Location: Wisconsin
PostPosted: Mon Feb 08, 2021 11:13 am    Post subject: Reply with quote
Lever could be loose on the shaft, shaft could be disconnected from diaphragm link (Item Y below). It is also not uncommon for the pump to be rebuilt and the manual handle could be completely disregarded during the rebuild and only left in position to fill the hole.


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45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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