Question about Carb Install - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BigRed · 06-06-2003, 04:24 PM

I'm installing my new(er) carb tonight and am curious about something. Do you guys just crank it a couple times for the fuel to fill the bowls or do you use something else to prime with?

PHOENIX · 06-06-2003, 04:25 PM

Crank it.

sbc350gearhead · 06-06-2003, 06:01 PM

If you are firing the engine for the first time, then fill the float bowls with a small funnel designed for the job (I use a small syringe). If not then crank it.....LOL

78chevstepside · 06-06-2003, 06:24 PM

I always keep a spray bottle around for that function. Using a spray bottle will control how much you spray in.

jay

maineiac · 06-06-2003, 07:49 PM

I would have to go with the flow on this one and say crank it!

jimfulco · 06-09-2003, 10:41 PM

Seems to me that cranking would get the oil flowing better before it fires up.

sbc350gearhead · 06-09-2003, 11:52 PM

There is virtually no oil flow until an engine fires up.

maineiac · 06-10-2003, 07:44 AM

I would have to disagree with that . I have always been taught to pull the coil wire and crank the motor a few revs to get the oil to the top of the motor. In a new motor I always use a rod to pump up the oil before ever turning it over.

Steve

Prerunner1982 · 06-10-2003, 08:08 AM

hell i maybe wrong here, but try putting a small about of fuel into the carb, then start it. it might help get the fuel in there quicker.

BigRed · 06-10-2003, 08:23 AM

Thanks guys. The carb install was done on Friday. All is well.

I just cranked it in short bursts. Didn't take too long.

rockman20 · 06-10-2003, 10:05 AM

The biggest thing you have to look out for when cranking a dry carb is this. If you have rebuilt the carb, did you put some lube on the accelerator pump seal?

The odds of this happening are sometimes small, but I have had it happen where I did a dry start, pumped the gas pedal a few times while cranking, and I ripped the seal on the accelerator pump. Just a caution.

On a Quad you can pour fuel down the pipe on top which will fill the bowl for you. When I do a rebuild, I like to put fuel in the bowl before I assemble the air horn.

06-06-2003, 04:24 PM	#1
BigRed Registered User Join Date: Jun 2002 Location: DFW, TX Posts: 1,680	Question about Carb Install I'm installing my new(er) carb tonight and am curious about something. Do you guys just crank it a couple times for the fuel to fill the bowls or do you use something else to prime with? __________________ Scott Shelbourne

06-06-2003, 04:25 PM	#2
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Crank it. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

06-10-2003, 08:08 AM	#9
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	hell i maybe wrong here, but try putting a small about of fuel into the carb, then start it. it might help get the fuel in there quicker. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

06-10-2003, 08:23 AM	#10
BigRed Registered User Join Date: Jun 2002 Location: DFW, TX Posts: 1,680	Thanks guys. The carb install was done on Friday. All is well. I just cranked it in short bursts. Didn't take too long. __________________ Scott Shelbourne

06-10-2003, 10:05 AM	#11
rockman20 "The dude abides" Join Date: Apr 2003 Location: North Dakota Posts: 472	The biggest thing you have to look out for when cranking a dry carb is this. If you have rebuilt the carb, did you put some lube on the accelerator pump seal? The odds of this happening are sometimes small, but I have had it happen where I did a dry start, pumped the gas pedal a few times while cranking, and I ripped the seal on the accelerator pump. Just a caution. On a Quad you can pour fuel down the pipe on top which will fill the bowl for you. When I do a rebuild, I like to put fuel in the bowl before I assemble the air horn. __________________ RockMan 1993 Chevy Silverado C3500 1 ton dually 1994 Honda Civic 1969 Oldsmobile Cutlass S 1953 IH Farmall Super M New to the fleet: 1992 Subaru Loyal

06-06-2003, 06:01 PM	#3
sbc350gearhead Registered User Join Date: Mar 2003 Location: Columbus Ohio Posts: 1,413	If you are firing the engine for the first time, then fill the float bowls with a small funnel designed for the job (I use a small syringe). If not then crank it.....LOL

06-06-2003, 06:24 PM	#4
78chevstepside Registered User Join Date: Nov 2002 Location: lacenter, washington Posts: 718	I always keep a spray bottle around for that function. Using a spray bottle will control how much you spray in. jay

06-06-2003, 07:49 PM	#5
maineiac Registered User Join Date: May 2003 Location: South Carolina Posts: 104	I would have to go with the flow on this one and say crank it!

06-09-2003, 10:41 PM	#6
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Seems to me that cranking would get the oil flowing better before it fires up.

06-09-2003, 11:52 PM	#7
sbc350gearhead Registered User Join Date: Mar 2003 Location: Columbus Ohio Posts: 1,413	There is virtually no oil flow until an engine fires up.

06-10-2003, 07:44 AM	#8
maineiac Registered User Join Date: May 2003 Location: South Carolina Posts: 104	I would have to disagree with that . I have always been taught to pull the coil wire and crank the motor a few revs to get the oil to the top of the motor. In a new motor I always use a rod to pump up the oil before ever turning it over. Steve



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