1957 Johnson Fuel Issue

This topic has 5 replies, 6 voices, and was last updated 2 years, 7 months ago by sutterhome.

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April 9, 2023 at 10:19 am #274972
Todd Radmer
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I have a 1957 Johnson 7.5 hp. When I pump the tank to start a cold engine it won’t start. It seems like it isn’t getting any gas from the tank. I squirt a little gas or starting fluid into the carb, it starts and runs great! I believe the issue is with the tank or hose? Any help would be appreciated!
April 9, 2023 at 10:39 am #274974
seakaye12
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If you haven’t already I would disconnect the fuel line at the carb and pump the plunger on the tank…..this will verify fuel flow from the plunger.

If no flow…..then you need to examine the plunger/pump parts in the tank assembly. There are parts diagrams available. Most likely the parts manual for your particular engine has a page for the tank parts.
April 9, 2023 at 10:40 am #274975
frankr
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Air and fuel hoses between tank and fuel connector swapped?

Depress check valve in fuel side of connector and push primer button on tank. Does fuel squirt out? It should.
April 9, 2023 at 11:07 am #274976
crosbyman
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Joining AOMCI has priviledges 🙂
April 9, 2023 at 12:08 pm #274980
Mumbles
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Float valve needle in the carb could be gummed up and stuck in the closed position.
April 9, 2023 at 3:47 pm #274982
sutterhome
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does it start up when warm or do you see the same problem?
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