Gas squirting from carb on acceleration


Information and questions on GL1100 Goldwings (1980-1983)
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Moosehead
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Motorcycle: 1982 GL1100 base Wineberry

Gas squirting from carb on acceleration

Post by Moosehead »



I own a 1982 GL1100 Standard. First time bike owner, I bought this bike <2 months ago.

I found fuel coming out from the right side carburetor housing when quickly accelerating from idol. I thought it was the fuel line or hose clamp going into the carb so I replaced all the gaslines.

In the process I noticed the culprit. Just closer to center of the fuel line going into the carb is a small vertical rod with a tiny rubber boot covering it that gets depressed by the throttle linkage on acceleration. The rubber boot is deteriorated, its not seated in the carb housing at all, and fuel squirts out all around it tricking me into thinking earlier it was the fuel hose, but it isn't.

What is that little vertical rod used for and can the squirting fuel be stopped without removing the entire carb assembly from the engine?

Would syncing the carbs be needed afterwards?

Thank you for the advice!


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winguyjo
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Re: Gas squirting from carb on acceleration

Post by winguyjo »

that is the accelerator pump. the (deteriorated) rubber accordion-looking thingy that you are talking about serves to keep gas from coming out and dust from going in. luckily, it is still available from partzilla, et al as part of a gasket set. i do not know whether it is available from other sellers as a separate piece, and if there is a fix for it without disassembling carb # 3 i would be interested in reading about it.
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winguyjo
Posts: 472
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wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
wing3 : 81gl1100i frame/82gl1100a engine/81cb900 bits. resurrection complete. naked. SOLD.
wing4 : 1977 gl1000 black w/ blue pinstripes; resurrection complete. SOLD
wing5 : 1977 gl1000 black w/gold pinstripes; nearly roadworthy when purchased, NOW RIDING.
wing6 : 1975 gl1000 blue; SOLD

Re: Gas squirting from carb on acceleration

Post by winguyjo »

p.s. ... synching carbs only serves to smooth out the idle, so it's not necessarily required after carb work if you are happy with the idle.
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winguyjo
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wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
wing3 : 81gl1100i frame/82gl1100a engine/81cb900 bits. resurrection complete. naked. SOLD.
wing4 : 1977 gl1000 black w/ blue pinstripes; resurrection complete. SOLD
wing5 : 1977 gl1000 black w/gold pinstripes; nearly roadworthy when purchased, NOW RIDING.
wing6 : 1975 gl1000 blue; SOLD

Re: Gas squirting from carb on acceleration

Post by winguyjo »

after further thought , i believe that is a dust seal only, and that your problem may be a ruptured or otherwise deteriorated accelerator pump diaphragm. the diaphragm, spring, dust boot and seal are available as a kit. at any rate, the carbs will have to be removed/disassembled/inspected/assessed/repaired/re-installed.
it's the reality of owning a 40 year-old vehicle.
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dingdong
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Re: Gas squirting from carb on acceleration

Post by dingdong »

winguyjo wrote: Tue Mar 10, 2020 12:27 am after further thought , i believe that is a dust seal only, and that your problem may be a ruptured or otherwise deteriorated accelerator pump diaphragm. the diaphragm, spring, dust boot and seal are available as a kit. at any rate, the carbs will have to be removed/disassembled/inspected/assessed/repaired/re-installed.
it's the reality of owning a 40 year-old vehicle.
Correct. Dust seal only.
Moosehead
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Re: Gas squirting from carb on acceleration

Post by Moosehead »

Sigh *** taking a big breath***. I don't know if I can do this. I know car stuff and I'm mechanically inclined,
but this is my first bike and my garage consists of some Harbor Freight tools and a sunny day in my parking lot. Not feeling too confident right now in completing this job on my own. Sigh.
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winguyjo
Posts: 472
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Motorcycle: wing1 : 1982 gl1100 interstate; resurrection complete. SOLD
wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
wing3 : 81gl1100i frame/82gl1100a engine/81cb900 bits. resurrection complete. naked. SOLD.
wing4 : 1977 gl1000 black w/ blue pinstripes; resurrection complete. SOLD
wing5 : 1977 gl1000 black w/gold pinstripes; nearly roadworthy when purchased, NOW RIDING.
wing6 : 1975 gl1000 blue; SOLD

Re: Gas squirting from carb on acceleration

Post by winguyjo »

it's manageable, especially if you are just going after the accelerator pump and nothing else. take pictures, write notes to yourself, stay ORGANIZED and CLEAN.
read, ask questions here and you'll get through it. harbor freight tools with do just fine but ...
do yourself a favour and order a JIS screwdriver. all those chewed up "phillips" head screws that we see on japanese motorcycles are the result of using phillips screwdrivers.
Moosehead
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Motorcycle: 1982 GL1100 base Wineberry

Re: Gas squirting from carb on acceleration

Post by Moosehead »

Thank you for the boost in faith! I found that accelerator pump rebuild kit and will be ordering it. It should be at my house in 5 days.


Would it be good to get a carburetor rebuild kit and replace the gaskets while im in there, or is where I'm going I'm not going to disturb anything that needs servicing?

Carb kit
Carb kit


Accessory pump kit
Accessory pump kit

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DenverWinger
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Re: Gas squirting from carb on acceleration

Post by DenverWinger »

Don't think you have to take carb apart to service accel pump. There's two check valves for the accel pump, one on inlet, one on outlet, consisting of a little BB size metal ball, a spring, and a little brass tab to hold them in place.

On the accel pump down stroke, the one on the inlet side to the pump prevents simply pushing the fuel back into the carb bowl where it came from, on the upstroke the one on the outlet side prevents the pump from pulling air from the outlet side. I didn't see check valve parts in the picture, but there isn't much that can go wrong with them. Just disassemble, clean real good and reassemble.

Maybe someone here has pictures.
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Re: Gas squirting from carb on acceleration

Post by Rednaxs60 »

If you don't already have one, highly recommend getting an OEM service manual. Will alleviate a lot of stress when working on these older GWs.
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dingdong
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Re: Gas squirting from carb on acceleration

Post by dingdong »

Here is good info on gl1100 carbs. They also have carb kits. If you purchase carb rebuild kits from other sources don't bother replacing the hard parts. All that is necessary are the rubber parts. Some aftermarket kits are made incorrectly and sized wrong. Example are jets and o-rings.

https://www.randakksblog.com/gl1100-carb-details/

Edit: Think about posting where you are located. Not just United States. Might be someone near you willing to assist.
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Overdog
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Re: Gas squirting from carb on acceleration

Post by Overdog »

You don't have to tear into the carbs to fix the pump. Here's a few suggestions. I'd pull the float bowls off and make sure the insides are nice and clean.,,worst that can happen is that you would need new gaskets for them. When you get the carbs back together get a long piece of fuel hose and hook up the carb rack to the petcock while the rack is sitting on a 5 gal pail next to the bike. Work the throttle and make sure you get a nice healthy squirt out of the accel. pump nozzles...they're tiny...mine were plugged (and there was a bunch of crap in the accelerator pump bowl itself). The O-ring that fits between the bowl and carb body is important..I hope your kit comes with a new one. My kit did not and I couldn't find anything to fit...Randaak bailed me out and sent me one. I didn't know better and ordered a kit from Ebay...NOT a Randaak kit. It was a nightmare! If you ever do need a full rebuild kit, get a Randaak kit! Here's a link to a how-to for a complete rebuild... https://ngwclub.com/forum/viewtopic.php?t=12168


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