Fuel pouring out of exhaust


Information and questions on GL1000 Goldwings (1975-1979)
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Str8jkt
Posts: 4
Joined: Fri Sep 30, 2016 10:06 am
Location: Mcalester, ok
Motorcycle: 1975 gl1000

Fuel pouring out of exhaust

Postby Str8jkt » Fri Sep 30, 2016 10:36 am



I have a 75 gl1000 and bought it as a project and I'll be damned if it isn't a project...it runs but only at very low throttle, it revs nice and sounds great but fuel pours out of the exhaust while it's running!

I just completed the carb rebuild and am hoping for some insight here?

Any ideas?



SnoBrdr
Posts: 329
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Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: Fuel pouring out of exhaust

Postby SnoBrdr » Fri Sep 30, 2016 12:36 pm

Str8jkt wrote:I have a 75 gl1000 and bought it as a project and I'll be damned if it isn't a project...it runs but only at very low throttle, it revs nice and sounds great but fuel pours out of the exhaust while it's running!

I just completed the carb rebuild and am hoping for some insight here?

Any ideas?


Stuck float?

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dingdong
Posts: 2865
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Fuel pouring out of exhaust

Postby dingdong » Fri Sep 30, 2016 4:32 pm

str8jkt. You will get more response if you post this on a separate thread.
Your problem is going to be either a stuck float, misadjusted floats or float valves not sealing. The floats have to be exact. Close doesn't count. The float valves should be OEM. After market valves tend to have problems sealing. Did you do the rebuild yourself or have someone else do the work? Did you use a part kit or just clean the carbs?
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Str8jkt
Posts: 4
Joined: Fri Sep 30, 2016 10:06 am
Location: Mcalester, ok
Motorcycle: 1975 gl1000

Re: Fuel pouring out of exhaust

Postby Str8jkt » Fri Sep 30, 2016 6:12 pm

Thanks for the insights, I did the rebuild myself. My first time so there could be an issue here although it seemed straightforward and I'm not a total idiot...

I used a kit from 2fast and everything seemed to be well made, I used my Clymer manual to step by step clean and rebuild the carbs. One at a time.

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dingdong
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Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Fuel pouring out of exhaust

Postby dingdong » Sat Oct 01, 2016 7:36 am

You may be aware of this but if not look through this carb rebuild tutorial. May be some tips to guide you in finding the problem. Good luck!

http://ngwclub.com/forum/viewtopic.php?t=2952
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Str8jkt
Posts: 4
Joined: Fri Sep 30, 2016 10:06 am
Location: Mcalester, ok
Motorcycle: 1975 gl1000

Re: Fuel pouring out of exhaust

Postby Str8jkt » Sat Oct 01, 2016 10:52 am

Thank you, I will pour back over it. Hopefully it's something simple. Bought Randakks float gauge so hopefully that will help as well.

sfruechte
Posts: 193
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Location: La Crosse, WI
Motorcycle: 1977 GL1000

Re: Fuel pouring out of exhaust

Postby sfruechte » Sun Oct 02, 2016 7:31 pm

Are you sure it's fuel and not just moisture? Gasoline vaporizes at 140 degrees. Are you also getting black smoke and lots of soot on your exhaust?

Str8jkt
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Location: Mcalester, ok
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Re: Fuel pouring out of exhaust

Postby Str8jkt » Sun Oct 02, 2016 9:59 pm

I'm mostly sure it's fuel, the smell is a major giveaway but I've wiped it up or soaked it up with shop tags every time I've run it. And black smoke from the exhaust. Mostly Clear or maybe a little white as far as exhaust color goes.

sfruechte
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Joined: Tue Mar 09, 2010 12:53 pm
Location: La Crosse, WI
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Re: Fuel pouring out of exhaust

Postby sfruechte » Mon Oct 03, 2016 9:20 am

Is it really thick enough to mop up? Gasoline is very thin and dissipates very fast. Could be moisture? Or anti-freeze?

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raven41951
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Re: Fuel pouring out of exhaust

Postby raven41951 » Tue Oct 04, 2016 10:13 am

Been watching this thread and I had to reply. IF you really have fuel pouring out of the exhaust, it would only take a small flash from an exhaust valve to ignite it and you would either have a bomb or one heck of an after-burner.

As said, gasoline is very volatile and evaporates quickly. Volatility also makes it burn very fast (explodes).

I suspect it is antifreeze as noted above. Leaking head gasket maybe. 1) Start with a cold engine. 2) put a pressure gauge on the radiator cap (the type used to pressurized the cooling system to check for leaks) but do not pressurize the system. 3) start the engine and watch the pressure gauge. 4) if there is any increase in pressure then the head gasket is leaking.

If the leak stops when the engine warms up then the head gasket is compressed and needs replacing.

pablo63
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Re: Fuel pouring out of exhaust

Postby pablo63 » Tue Oct 04, 2016 5:48 pm

I had the same problem , bike would hard start ,run like crap , sometimes starter would lock up as the #4 cylinder would fill with gas and cause hydralocking , I removed the exhaust manifold to then remove the starter which I thought was fried and a large amount of gas pours out of the exhaust manifold , I then removed all four plugs , replaced the starter which I had bench tested and was perfectly fine , once I removed the # 4 plug there was gas just below the plug threads , I turned over the motor to displace the gas , before I even tried starting again I stripped the carbs and re-built with a Randaaks master overhaul kit , two of the very small strainers above the floats were almost plugged off , that explained the bogging down at hi-speed , I replaced the # 4 carb float valve with a Honda float kit which includes the float ,strainer and seat , had to set the float height to the correct height of 21 mm as it was way off , I had purchased a float height guage from Randaaks ,also replaced the fuel filter as if it's old and degraded all the work would be in vain as those very small strainers above the float valve would get plugged again , I bolted everything back together , the bike never worked so good ,starts easy pulls strongly through all gears and overtaking in fith gear from 75 mph is now a cinch , well worth the effort and wish I had done it sooner .




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