FUEL SYSTEM


Information and questions on GL1000 Goldwings (1975-1979)
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farrell1957
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Location: sanbernardino ca.
Motorcycle: 1977 GL1000 Goldwing

FUEL SYSTEM

Postby farrell1957 » Fri Apr 15, 2011 2:12 am



on a 77 gl1000 my fuel pump is working but im not getting any fuel to the float bowles , all are empty , any ideas ? Thanks



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virgilmobile
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Re: FUEL SYSTEM

Postby virgilmobile » Fri Apr 15, 2011 7:29 am

Gl1000 fuel pressure is about 2-2.5 psi.It's possible you may have fuel but no pressure to fill the bowls.Or the fuel rail in the carb pack is plugged,screens plugged,needle valves stuck,etc.To eliminate a fuel source problem,I have taken a clear 4' length of tubing,filled with gas,attach to the carb fuel,raised the tube as high as I could reach.4' height will create about 2 psi at the bottom.If the fuel doesn't flow,tap on the bowls to release the stuck parts.If the fuel goes right into the bowls,It' a pump or source.The pump can be removed and hand tested.

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thrasherg
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Re: FUEL SYSTEM

Postby thrasherg » Fri Apr 15, 2011 9:59 am

I would suggest that it could be your float valves. I don't know how you know no fuel is getting to the carbs, have you pulled the fuel feed line off and nothing is coming out? or have you opened the carb drain screw and nothing is coming out? If fuel is left for a while it evaporates and leaves nasty sticky deposits behind that can easily gum up the small moving parts in the carburetor. If you haven't already done so, I would suggest disconnecting the fuel line where it connects to the carbs and see if you have fuel coming out. If you do then your carbs are probably gummed up and need cleaning. If nothing comes out the fuel pipe, then either your fuel pump has gummed up/failed or you have a blockage in the fuel line, either should be fairly easy to locate. I am not sure if your fuel pump is electronic or mechanical? If it's mechanical you will need to crank the engines with the electric start to see if any fuel comes out. If it's electrical it becomes more awkward as I believe the fuel pump only operates when the engine is running. However, regardless of whether the fuel pump works, if you have gas in the tank, it should be able to flow through the pump to the carbs!!

Gary

farrell1957
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Motorcycle: 1977 GL1000 Goldwing

Re: FUEL SYSTEM

Postby farrell1957 » Sat Apr 16, 2011 1:11 am

Thanks for the info , this gl was in a guys back yard for about 6 years only thing covering it was rust. The gas tank was rusted out so i replaced that , i took the carbs off gave them a good cleaning and blew all the ports out . I replaced the fuel filter ,vacuume lines and fuel lines . I pulled the carb feed line off the fuel pump ( witch is mechanical ), turned the motor over quite a few times and gas was being pumped out. I hooked the feed line back up turned the motor over several times , opend up the float bowel drain screws all 4 carbs were empty. That about sums it up , does this info change anything you have advised me on ? I will follow your advice and let you know what happens. Thank you for your time and sharing your knowledge , it sure helps a beginner like me .

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dingdong
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Re: FUEL SYSTEM

Postby dingdong » Tue Apr 19, 2011 8:55 am

When you "cleaned" the carbs did you pull the float seals and seats and clean the filter screens? There are a lot of passages, ports and jets in these carbs that need special attention. Since the bike has sat outside for so long there is going to be dried gummed up fuel in every passage as well as corrosion.
Also when the bowls are empty it requires more than a couple of turns to fill them up. More like 25 to 30.
Tom

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landisr
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Location: Gilbert, AZ
Motorcycle: 1976 GL1000
1994 GL1500A

Re: FUEL SYSTEM

Postby landisr » Wed Apr 20, 2011 10:05 am

Sorry if I'm all wet, but I think the fuel filter can only work in one direction, no? If so, then make sure you installed it properly. Just a thought.

Ron in MI
Beam me up, Scotty. There's no intelligent life down here.

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thrasherg
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Re: FUEL SYSTEM

Postby thrasherg » Wed Apr 20, 2011 10:08 am

Low pressure Fuel filters (as used on vehicles with carburetors) will usually allow fuel to flow in either direction, but do have a preferred direction.. ;)

Gary

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eklimek
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Re: FUEL SYSTEM

Postby eklimek » Wed Jun 01, 2011 8:23 am

Rather than start a new thread I piggy backed this posting here.

In reviving my new-to-me 81 GL1100 I found the #4 cylinder running lean after I ran out of fuel on my first tank. (Of course the gas gauge is non functional but the temp is working fine)

I thought it might simply be debris in the #4 carb. Fool that I be, I attempted to drain unscrewing the brass plug on #4. After 30 years of living untouched it declined to be removed. I tore the head off the bolt. Now have the threaded portion remaining, hole is present and drained as intended. (Well done idiot.)

So how do I get it out without removing the whole assembly? Bit tight as is.
Or do I tap and plug?
Or do I go shadetree with an insert and JB weld?

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virgilmobile
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Re: FUEL SYSTEM

Postby virgilmobile » Wed Jun 01, 2011 2:41 pm

Third option,ask somebody if they have a junk carb you can get the bowl off from.
Shade tree it if you just gotta ride now.
pull the bowl,soak it,reverse tap the plug out(maybe if your lucky)

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Fred Camper
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Re: FUEL SYSTEM

Postby Fred Camper » Wed Jun 01, 2011 9:16 pm

I think find another bowl from the identical carb number. They are different every year, but remember Honda make lots and lots of wings, and many, many owners mistakenly part them out. They are too nice of a bike for that, but that is there lot. If you broke the head off, I doubt an easy out would work, and drilling and re tapping seems like a waste of your effort as the risk of failure is high.

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eklimek
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Re: FUEL SYSTEM

Postby eklimek » Thu Jun 02, 2011 6:58 am

Thanks for your suggestions. I have an identical 81 donor bike but don't relish spending the time to remove the carburetors just to replace one bowel.

I think that might ... (nah not likely) ... become a winter project if they all need rebuilding.

The "easy out" is also a tight job and if it fails or cracks the bowel ....

I may just insert a small screw and epoxy to seal the hole. The chamber is low pressure. Any preferred sealant come to mind?

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landisr
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Re: FUEL SYSTEM

Postby landisr » Thu Jun 02, 2011 8:37 am

I feel your frustration...
Beam me up, Scotty. There's no intelligent life down here.

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scotterichmond
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Re: FUEL SYSTEM

Postby scotterichmond » Thu Jun 02, 2011 11:51 am


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Fred Camper
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Re: FUEL SYSTEM

Postby Fred Camper » Thu Jun 02, 2011 9:15 pm

JB Weld seems like it would work, but I like to be able to drain the carbs in the winter.

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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: FUEL SYSTEM

Postby virgilmobile » Fri Jun 03, 2011 7:24 am

JB Weld works IF the surface is clean.
I suppose if you wanted to leave it that way and drain the bowl each winter,You could just drill another hole in it then epoxy it back up :lol: Looks like a block of swiss cheese tho.

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Fred Camper
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Re: FUEL SYSTEM

Postby Fred Camper » Fri Jun 03, 2011 9:11 pm

No big deal to replace that bowl, just do it. This is too good of a bike to make cheese out of.

goldtr6c
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Re: FUEL SYSTEM

Postby goldtr6c » Fri Jun 03, 2011 9:27 pm

I agree with dingdong. Pull the float needle seats and check the filter screens under them. You'd be surprised as to how much super fine rust dust can go through the stock filter and clog these little screens.

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eklimek
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Motorcycle: 81 GL1100 (Widowmaker not in service), 83GL1100, CB350f x 6, CB400f x2, CB550f sold, CL350 (seized engine), plus enough donors to take me through retirement.

Re: FUEL SYSTEM

Postby eklimek » Sun Jun 05, 2011 8:23 am

Thanks. After much reflection I have deferred the complete replace and reinstall. 2 part epoxy and a small rod in the hole and we are done for the moment.

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Fred Camper
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Re: FUEL SYSTEM

Postby Fred Camper » Sun Jun 05, 2011 8:46 pm

Good to see progress, let us know how it works out. As long as you can seal the drain then all is well. Seems likt it may work.




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