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#1387050 12/04/2020 3:24 PM
Joined: Jan 2020
Posts: 620
D
'Bolter
'Bolter
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Joined: Jan 2020
Posts: 620
My 54-3100 has been completely rebuilt ( engine ), for 43 years it has had the same starting procedure. Pull choke 3/4 out pump gas peddle twice while pushIng starter foot knob. It always started. After not starting for a week it would start after about 3 seconds. Now after setting for4 days it cranks way too long. It spins very fast ( 12 volt on six volt double batteries), very good Rochester B no leaks, new butterfly shafts and bushings #58 jet, accelerator pump, power piston and spring etc. After letting it set for two hours after turning it over for 15 seconds it started immediately. On my 42, 216 I have always had to dribble gas into carb. to get it to start right away. What I'm I doing wrong ? Doc. Help, help, I'm stuck in Central Florida and it's finally below 98 degrees, I can work outside.


Currently making 1954 3100 better than new and Genetics
Joined: Apr 2005
Posts: 7,442
Bolter
Bolter
Joined: Apr 2005
Posts: 7,442
After setting 3-5 days, before you even try to start it, remove the top from the carburetor and see if any gas is in the float bowl. Place to start trouble shooting from.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
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USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)

Joined: Feb 2020
Posts: 71
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'Bolter
'Bolter
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Joined: Feb 2020
Posts: 71
How long has the gas been in the tank? Check engine oil level and smell it for gas. Bad fuel pump?


51 GMC 100 with 59 chevy 261 under the hood.
3 on the floor with 3.42 gear.
Joined: Apr 2009
Posts: 554
H
'Bolter
'Bolter
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Joined: Apr 2009
Posts: 554
My truck often sits for a while without use and I had the same issues. I solved it with an Airtex E8012S Universal Electric Fuel Pump. This is an inline pump, no separate parallel plumbing required. It allows pretty much unrestricted flow forward while off but prevents backflow. It is also low pressure. I have it hooked up to a push button switch- run it for a few seconds prior to starting the truck if it sat for several days and it starts immediately. I had converted to 12v. If you are 6v you may be able to find something similar. There are other similar 12v pumps too.

Joined: Feb 2004
Posts: 28,674
H
Kettle Custodian (pot stirrer)
Kettle Custodian (pot stirrer)
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Joined: Feb 2004
Posts: 28,674
Test the fuel pump. It sounds like the one-way valves on either the inlet or the output side (or both) are letting the gas drain back out of the pump-to-carb line when the truck sits idle for a while. Also, you should pull the choke knob out all the way on a cold start, forget about pumping the gas pedal, and crank the engine until it fires. Then push the choke knob in a little to keep the engine from stalling.
Jerry


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Joined: Jul 2018
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Jolly Roger
Jolly Roger
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Joined: Jul 2018
Posts: 163
tear down the top half of the carb and make sure all the brass tubes arent broken and make sure all the steel bbs are in the proper placement. i had that issue and it had issues starting because it simply ran too rich.


Owner of the most temperamental 1951 3100 in existence

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