one carb not getting fuel [gl1000]

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jml74
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one carb not getting fuel [gl1000]

#1

Post by jml74 »

Carburetor #2 on my '77 GL1000 is not getting fuel, but the other three are and I'm not having any luck finding a diagram of the fuel circuit (not parts diagram) or even a picture that specifically calls out the fuel inlet. How should I go about troubleshooting this? There is what looks like a fuel line that goes from the carb body to the top of the plenum body, but is that the circuit for the air cut valve? If that line is the ACV, is there anywhere I can manually fill the bowl to see if that changes things?
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gltriker
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Re: one carb not getting fuel [gl1000]

#2

Post by gltriker »

No. Injecting fuel into that regulated slow air hose completely bypasses the float set fuel inlet needle and seat, itself.
But, if you just need to know if that cylinder will respond to whatever volume of gasoline you would directly inject into the carburetor's fuel bowl through the slow air hose I reckon that would work 😉


The link to information you seek is provided courtesy of Whiskerfish
https://www.ngwclub.com/forum/viewtopic.php?t=43640
Last edited by gltriker on Sun Sep 17, 2023 6:21 am, edited 1 time in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
jml74
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Re: one carb not getting fuel [gl1000]

#3

Post by jml74 »

Thanks. I looked in the tech tips sub, but I didn't realize there was one dedicated to drawings. I guess my next question is if 3/4 carbs are getting fuel, is there anything other than a stuck float needle that would be a likely cause of this? (If you can't tell, I'm trying to figure out if there is anything I can do before pulling the carb rack. :-D )
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gltriker
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Re: one carb not getting fuel [gl1000]

#4

Post by gltriker »

Is your suspicion confirmed by opening all 4 fuel bowl drain screws ?
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
jml74
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Re: one carb not getting fuel [gl1000]

#5

Post by jml74 »

gltriker wrote: Sat Sep 16, 2023 11:37 am Is your suspicion confirmed by opening all 4 fuel bowl drain screws ?
Yes, precisely
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gltriker
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Re: one carb not getting fuel [gl1000]

#6

Post by gltriker »

Post#6

The "rack" has previously been removed, completely disassembled and lovingly refurbished with quality parts we presume? 😉
Last edited by gltriker on Mon Sep 25, 2023 9:59 pm, edited 3 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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gltriker
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Re: one carb not getting fuel [gl1000]

#7

Post by gltriker »

jml74 wrote: Sat Sep 16, 2023 10:42 am Carburetor #2 on my '77 GL1000 is not getting fuel, but the other three are and I'm not having any luck finding a diagram of the fuel circuit (not parts diagram) or even a picture that specifically calls out the fuel inlet. How should I go about troubleshooting this? There is what looks like a fuel line that goes from the carb body to the top of the plenum body, but is that the circuit for the air cut valve? If that line is the ACV, is there anywhere I can manually fill the bowl to see if that changes things?
viewtopic.php?t=78012&start=15 see my POST #18 ;) 1st photo - flattened and leaking - carb flange fuel inlet passage sealed connection to surface of plenum
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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gltriker
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Re: one carb not getting fuel [gl1000]

#8

Post by gltriker »

Post#8
My trike's 1976 LTD spec carburetors.
Randakk kit rubber parts hold up well. Rust fines and other particulates will collect in the fuel inlet passage and clog the float valve seat filter screen. The float valve seat must be entirely removed to clean the very fine filter screen and fuel inlet passage.

Short cutting, instead, with Aerosol spray and air pressure is pointless. ;)
@
20230723_123707 - coupled carbs #1 and #3.jpg
20230723_123707 - coupled carbs #1 and #3.jpg (56.97 KiB) Viewed 483 times
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20230723_131228.jpg (72.07 KiB) Viewed 483 times
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20230723_135246.jpg (82.82 KiB) Viewed 483 times
20230723_135833 - side view float seat and filter screen.jpg
20230723_135833 - side view float seat and filter screen.jpg (47.38 KiB) Viewed 447 times
20230723_135522 - end view of filter screen.jpg
20230723_135522 - end view of filter screen.jpg (21.99 KiB) Viewed 447 times
Last edited by gltriker on Mon Sep 25, 2023 9:49 pm, edited 3 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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Fred Camper
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Re: one carb not getting fuel [gl1000]

#9

Post by Fred Camper »

Often when a carb is not getting fuel, it is that float inlet screen that Cliff shows, is completely clogged.
Proud member of the NGW Cartel (Rochester MI)
1977 GL1000 BADDOG (April 2012 BOTM)
1976 LTD - '993 LTD...and so it begins'

You should remember that it's peace of mind you're after and not just fixing the machine. R.Pirsig
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gltriker
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Re: one carb not getting fuel [gl1000]

#10

Post by gltriker »

Post#10
Fred Camper wrote: Mon Sep 18, 2023 9:58 am
Often when a carb is not getting fuel, it is that float inlet screen that Cliff shows, is completely clogged.
tumb2 there's countless stories of this unexpected discovery.
RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2

Best believe those words, too !! Fuel tank service and, Especially, multiple sessions of carburetor "rack" pull again and revisit their internals is an unquestionable Rite Of Passage with a new to you GL1000.

Wishin' and Hopin' and Thinkin' and Prayin' won't Fixem. :oldies
Last edited by gltriker on Mon Sep 25, 2023 10:13 pm, edited 3 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
redglbx
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Re: one carb not getting fuel [gl1000]

#11

Post by redglbx »

Cliff, 100% agree ! Greg’s words are spot on ! I used to wonder where all the trash came from that collected in the float valve seat filter until I opened the fuel level arm hole in the tank and was shocked at at the stuff in the tank.

If you find yours to be contaminated pull the fuel level arm out and the on/off/reserve valve off the side. Pull the tank out the back and take it to a quality radiator shop so they can boil it out (clean) and maybe coat the inside so it doesn’t rust again. That’s where all that fine silt you find in the float filters and bowls comes from.

Sorry but you’re going to have to pull the carbs and take a look. If you decide to rebuild things get Randakks kit. Expensive, yes but their kits are made from Viton rubber which resists the alcohol in todays fuels as well as many other chemicals, well worth it !
Red 1976 oe owner
1976 LTD restored
1980 CBX , in the que, to fix the ignorant heavy handed owner
1981 CBX
1977 CB750 K7
2014 FJR OE owner, sold
1980 GL1100
1984 GL1200 naked
1969 CL350, in the que
redglbx
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Re: one carb not getting fuel [gl1000]

#12

Post by redglbx »

So jm174, just curious, when you opened the bowl drains you had no fuel come out of #2 ?
Red 1976 oe owner
1976 LTD restored
1980 CBX , in the que, to fix the ignorant heavy handed owner
1981 CBX
1977 CB750 K7
2014 FJR OE owner, sold
1980 GL1100
1984 GL1200 naked
1969 CL350, in the que
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