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Delco and other Low Voltage DC Light Plants Antique Generators, Light Plants, Typically 24, 32 or 48 volt although some are 110 volt. DC Lamps, Motors and appliances.

Delco and other Low Voltage DC Light Plants

A quick question on Delco fuel system...


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  #1  
Old 11-09-2015, 12:14:34 PM
George Andreasen George Andreasen is offline
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Default A quick question on Delco fuel system...

I'm making steady progress on my Delco Light 850. Yesterday I removed the fuel tank for the usual inside de-rusting and discovered that the fuel pick up tube....a piece of 1/4" copper....has no check valve which surprised me. Instead, the end of the tube is cut at an angle. Is this the normal factory set up?

There is a port on top of the mixer for priming but it appears that the pick up tube relies strictly on the engine rpm to provide enough suction when starting.
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Old 11-11-2015, 08:13:58 PM
Dale Burkman Dale Burkman is offline
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Default Re: A quick question on Delco fuel system....

The 850's don't use a check valve. The angle cut is the factory end. Dale Burkman
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Old 11-12-2015, 07:14:53 AM
George Andreasen George Andreasen is offline
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Default Re: A quick question on Delco fuel system....

Thanks Dale.......I suspected as much. Even though the gas only has to be "pulled" up a few inches I really expected some sort of check valve as on my other engines, even a little ball check. I just wasn't sure!
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Old 01-16-2016, 08:21:30 PM
pbruxer pbruxer is offline
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Default Re: A quick question on Delco fuel system....

I have a bunch of Delcos and all have a check ball at the fuel pickup. These low compression engines will not start without fuel at the mixer immediately. 850 models run on kerosene and the priming cup is for a little gasoline to get them running up to speed.
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Old 01-16-2016, 08:27:59 PM
George Andreasen George Andreasen is offline
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Default Re: A quick question on Delco fuel system...

Good point. The low compression (and it IS low) probably won't create much suction and maybe a much longer start up time. I have some used 8 volt golf cart batteries lined up and, although I'm sure they'll work fine, I really should keep the cranking time to a minimum.

I'll try priming with gas and see if it will run long enough to pull fuel up the line. Adding a check valve would be easy if needed though, in fact I've been giving it some serious thought lately just to keep the cranking time shorter.
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Old 01-16-2016, 08:31:49 PM
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Junkologist Junkologist is offline
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Default Re: A quick question on Delco fuel system...

My Delco doesn't have a check valve. I choke it and it starts right up with no problem. You shouldn't need one and if you add one, it's just something that could cause problems after sitting. If it ain't broke , don't fix it.
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Old 01-16-2016, 08:33:00 PM
George Andreasen George Andreasen is offline
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Default Re: A quick question on Delco fuel system...

Makes me wonder if the check valve was for the Canadian market?? I'll try it without first and see what happens. Thanks guys!
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Old 11-21-2016, 12:10:58 AM
Slimfinnish Slimfinnish is offline
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Default Re: A quick question on Delco fuel system....

Will it hurt the engine to run on gas. Slimfinnish
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Old 11-21-2016, 11:35:36 AM
George Andreasen George Andreasen is offline
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Default Re: A quick question on Delco fuel system...

No, it will not hurt the engine to run on gas. The compression is lower than most gas engines so that it will run on kerosene, but it will run just fine.

As an update to this original post, I replaced the entire fuel line with a new one, having a loop in it. This keeps some gas right at the mixer and makes it start a bit quicker. I removed the check valve as I think it was actually starving the engine for fuel a tiny bit.
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Old 11-22-2016, 01:50:44 PM
abowman89 abowman89 is offline
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Default Re: A quick question on Delco fuel system...

I honestly didn't realize they were kerosene engines.......
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