The Ford Barn

53_mercLuke · 05-30-2020, 02:29 PM

I just rebuilt my holley teapot carburetor and it runs great at idle but when I give it 1/4 to 1/2 throttle it spits then dies. The float looks level from the top. I replaced the fuel filter and the pump is mechanical but not that old. I also replaced the distributor cap and rotor and the vacuum advance on it to eliminate that from being a possible issue. Any other thoughts?

Thanks

hotrodart · 05-30-2020, 02:48 PM

Sounds like the accelerator pump is not working. There should have been a new one in the rebuild kit. Make sure it has a snug fit in the cylinder. Also make sure you put in the check-ball to allow the pump to make pressure.

51 MERC-CT · 05-30-2020, 04:35 PM

Try moving the pump adjustment to the hole that is farthest from the shaft center line.

Merc Cruzer · 05-30-2020, 04:53 PM

Quote:

Originally Posted by hotrodart

Sounds like the accelerator pump is not working. There should have been a new one in the rebuild kit. Make sure it has a snug fit in the cylinder. Also make sure you put in the check-ball to allow the pump to make pressure.

Accelerator pump, picture attached.

Prior posts may give you a few hints, as to correct float and fuel levels:

https://www.fordbarn.com/forum/showt...ht=float+level

https://www.fordbarn.com/forum/showt...vel+carburetor

53_mercLuke · 05-31-2020, 12:45 PM

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Update on my running issue:

I moved the pump adjustment over to the right from the middle and it helped alittle. But I also found the diaphragm from the kit for the power valve was another shorter then the original so luckly i saved the old one and put it in and now its running like a champ. Thanks for the help guys

05-30-2020, 02:29 PM	#1
53_mercLuke Member Join Date: May 2016 Location: Houston TX Posts: 79	1953 Flathead acceleration issue I just rebuilt my holley teapot carburetor and it runs great at idle but when I give it 1/4 to 1/2 throttle it spits then dies. The float looks level from the top. I replaced the fuel filter and the pump is mechanical but not that old. I also replaced the distributor cap and rotor and the vacuum advance on it to eliminate that from being a possible issue. Any other thoughts? Thanks

05-30-2020, 02:48 PM	#2
hotrodart Senior Member Join Date: May 2010 Location: Shenandoah Valley Virginia Posts: 220	Re: 1953 Flathead acceleration issue Sounds like the accelerator pump is not working. There should have been a new one in the rebuild kit. Make sure it has a snug fit in the cylinder. Also make sure you put in the check-ball to allow the pump to make pressure.

05-30-2020, 04:35 PM	#3
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: 1953 Flathead acceleration issue Try moving the pump adjustment to the hole that is farthest from the shaft center line. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

05-31-2020, 12:45 PM	#5
53_mercLuke Member Join Date: May 2016 Location: Houston TX Posts: 79	Re: 1953 Flathead acceleration issue Sponsored Links (Register now to hide all advertisements) Update on my running issue: I moved the pump adjustment over to the right from the middle and it helped alittle. But I also found the diaphragm from the kit for the power valve was another shorter then the original so luckly i saved the old one and put it in and now its running like a champ. Thanks for the help guys