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| | | | Joined: May 2010 Posts: 144 Wrench Fetcher | | Wrench Fetcher Joined: May 2010 Posts: 144 | My '53 with a 235 and two Holly Weber carbs loses prime if left not started for a couple of days. One hour after running, no problem. After sitting awhile, it almost uses my battery up getting it to fire. Is there an aftermarket check valve to prevent fuel line drainage or is there a way to install an electric pump that bypasses the original? I have a 12 vlot electrical system.
Any help appreciated.
John | | | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,747 | You can put an electric pump and pressure regulator on. You will need to block the pump mount with a gasket and plate. But what you most likely have are some leaky vale and seats in the carbs. The fuel should not leak from the float bowels. You might have a pump with bad check valves that allows the fuel to flow back into the tank. But that would only happen if the tank is lower than the pump. Check valve is available. Here is one source. http://www.oreillyauto.com/site/c/detail/RUS0/650603/N0284.oap?keyword=check+valve
Steve H
| | | | | Joined: Mar 2010 Posts: 10,294 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,294 | I think that you are misdiagnosing your symptoms. If there are floats, needles, and seats in your Holley Webers, You should be able to start right up and drive most of the way to the grocery store on the gas contained in the bowls.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: May 2010 Posts: 144 Wrench Fetcher | | Wrench Fetcher Joined: May 2010 Posts: 144 | The truck runs great and gets 14 mpg after it starts and starts immediately within a few hours of having been previously started. Somehow it looses gas during longer shutdowns. I checked it again today and found no leaks or signs of leaks at the carbs but did find a tiny amount of fuel on the top of the pump. Mine has 6 screws holding the top half on the pump body and all needed about 1/8 turn to fully tighten. My pump has a silver colored metal "lid" held in place by a single 3/8" head bolt. That may have been where the line leaked down from the carbs. I agree that if the carbs do in fact have "bowls" (may not), there should be fuel in them to start with. They show absolutely no signs of leakage and if they are sealed, evaporation from within doesn't seem possible. I bought the carbs new from Tom Langdon so I will call him to see if he has a clue about my problem.
John | | |
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