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04-10-2023, 10:17 AM | #1 |
Senior Member
Join Date: Sep 2021
Location: summerton, sc
Posts: 353
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94 carb leak down
Why do the carbs loose their prime, must be a regular thing with lots of guys using electric pumps to prime the carb after sitting a few days ect ? I've got one that does it, runs good new power valve (flat base good seal), can't smell gas in oil. Don't want to put prime pump on it because i shouldn't have to. No leaks everything tight.
thanks kurt |
04-10-2023, 11:08 AM | #2 |
Senior Member
Join Date: May 2010
Location: Wisconsin, USA
Posts: 9,010
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Re: 94 carb leak down
Couple of things...
1) these carbs are open to the atmosphere. Evaporation at work. 2) Fuel pump is not working properly. There is a check valve within the pump that prevents fuel from flowing "backwards". I tend to pull the choke out when I shut a car down during summer driving months. that does slow down the evaporation. My '36, during winter storage, is started once per month. I simply make certain the choke s pulled out, pump the throttle a few times and hit the starter button. Within ten seconds tops, the engine fires. Both the fuel pump and carb were rebuilt by Charlie Schwendler.
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04-11-2023, 07:34 PM | #3 |
Senior Member
Join Date: Jan 2019
Location: Chicago
Posts: 732
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Re: 94 carb leak down
I have always had the same problem with all collector cars that don’t get driven often. Fuel in the carburetor bowl evaporates. I think it is just less of a noticeable problem with cars from the fifties or newer. The 12 volt engines crank faster, fuel pumps pump faster. Henry’s fuel pumps were “just good enough”, so takes some cranking to fill the carb.
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04-11-2023, 07:41 PM | #4 |
Senior Member
Join Date: Dec 2015
Posts: 547
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Re: 94 carb leak down
That’s a good idea on pulling the choke to limit evaporation. Thx!
JB |
04-12-2023, 12:14 PM | #5 |
Senior Member
Join Date: May 2010
Location: Williamsburg, Virginia
Posts: 2,654
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Re: 94 carb leak down
I run an electric fuel pump in line. When the car sits I let it pump up. Once it slows diwn I start the car and shut the electric pump off. The car can be sitting fir two months and she will start the first or second attempt ….
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04-13-2023, 05:37 PM | #6 |
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Join Date: May 2010
Location: South Texas
Posts: 1,631
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Re: 94 carb leak down
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