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Discussion Topic:
Leaking carburetor, weak fuel pump ?
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TomO |
02-15-2022 @ 7:24 AM
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Senior
Posts: 7250
Joined: Oct 2009
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I can let my 40 Mercury sit for 3 or 4 weeks and it starts right up. After sitting all winter, it takes about 30 seconds to prime the carburetor. I suspect that you have a vacuum leak in the lines leading to the fuel pump or that your fuel pump valves are leaking. A fuel delivery test will help determine if this is your problem.
Tom
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sarahcecelia |
03-14-2022 @ 3:45 PM
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Senior
Posts: 1182
Joined: Mar 2013
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That priming system you are using can be very dangerous!! You can buy a spray can of primer at the local auto supply. you just remove the air cleaner, give a shot of it and start it! You can also just pour about an ounce or so down the carbs throat and start it! The bowl on a carburetor has gas in it; some of it will evaporate in about 2 or more weeks. When you want to start the car; after it sits for 4-5 days; take the air cleaner off and stroke the accelerator rod while looking directly down the carbs throat. You should see 2 small streams of gas going into the manifold- if you don't see them; the gas leaked out of the carb. Running a car Less than about a 15-20 mile round trip is very detrimental!! It doesn't get a chance to get to operating temp. or re-charge the battery!
Regards, Steve Lee
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sarahcecelia |
03-27-2022 @ 6:41 PM
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Senior
Posts: 1182
Joined: Mar 2013
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Electric fuel pumps must be left on all of the time!! I forgot to turn mine in with the little on/off switch on the lower edge of the dash; well when I was driving down the road the motor started to die several times and I thought "What's wrong now!!" It finally quit! I then realized the electric pump was OFF! Turned it on, started the car, and went merrily on my way!! When they are in the OFF POSITION they BLOCK THE FUEL FLOW!!!!
Regards, Steve Lee
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