Question about Harley Davidson FLHTCUI Electra Glide Ultra Classic Motorcycles

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Excessive carbon build up around carb and exhaust pipe

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Id say a rich condition or choke not fullly off when warmed up ..Id drop a spot on the needle w/ the clip..

Posted on Mar 31, 2011

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Posted on Jan 02, 2017

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1 Answer

What is rich fuel condition


If you remove plugs and look them over proper burned plug will look coco brown ,not wet not blackish residue , carbon build up around electrode , that's the best I can do not knowing what it is ? high carbon in exhaust pipe ,or dark smoke ,smell of unburned fuel.

Sep 02, 2014 | Cars & Trucks

2 Answers

4 brl rochester carb


Backfiring is caused by either the firing order being incorrect or the engine timing is incorrect. generally backfiring through the carburetor is caused by incorrect firing order. confirm the distributor is inserted properly and double check firing order beginning with cylinder number 1.

Mar 22, 2014 | 1984 Buick Regal

1 Answer

I will get high exhaust temprature ( 700c with 60-80% load at 1480RPM


well it could be due to a high carbon build up the carbon build up and hold the heat so It gets really hot fast, ether that or you have a some sort of obstruction on your exhaust pipe.

Oct 27, 2013 | Caterpillar New 3512B HD Diesel Generator...

1 Answer

I have a Peugeot partner 1.9d and it has really poor acceleration, start and idle is fine but I need to have my foot pinned to the floor to go anywhere?


Excessive carbon build up in exhaust may have caused problem. Remove muffler, check exhaust part of cylinder and carefully remove carbon deposit.

Aug 24, 2013 | Garden

1 Answer

I have an Echo Grass Trimmer, GT2000. It runs and idles ok, will not up rev up to speed. It runs at about 1/3 of what it should, on high. I've replaced the spark plug; taken the carb apart and cleaned...


This sounds very much like a blocked spark arrestor in the muffler outlet, or the exhaust port is blocked with carbon, remove the muffler and look up the open exhaust port for signs of carbon build up, somewhere in the muffler there will be a mesh gauze ( spark arrestor ) either clean this or remove it completley.

Sep 08, 2011 | Garden

1 Answer

Eton four-wheeler will only start for a second after I spray carburetor with carburator spray help me to get it to run


There are a lot of tiny fuel and air passageways in the carburetor that must be kept clean it order for your scooter to run right. Carefully, take the carburetor apart. This can be relative easy (on a 50cc scooter). The carb has tiny passages that can get gummed up. Your scooter will not run correctly if the carburetor isn't completely clean, so take your time. I use a gallon container of carb dip (you can get a gallon at your local auto supply store).
First, remove all of the rubber and gaskets or they will get damaged. After a 20 minute soaking in carb dip, I blow out the carb with compressed air. You have to get all the jets and the passageways clean. Be sure the jets are clear, especially the starter jet. Sometimes carb cleaner won't clear out these tiny jets. Use a guitar or a piano string, a strand of copper electrical wire, or a tiny drill bit pin vise. Be sure not to increase the size of the hole in the starter jet or you'll change the tuning. Carefully reassemble everything, checking for cracks in the rubber carb boots and the gaskets. Replace them if they are old and cracked. Be sure and remove all rubber and gasket material first or they could get ruined. Spray carb cleaner also works if you're diligent.
If you have an electric choke, check it to make sure it works. Check the resistance between the wires - you should see around 10 ohms or less. Measure the length of the choke assembly. Remove the choke from the carb and plug the wires into a 12V source for 15 minutes. The choke body should be warm. Measure the length again - it should increase by around 1/8".
Next, consider whether your exhaust pipe is clogged. This is especially a problem with older two stroke scooters. The unburned fuel/oil mixture builds up in the exhaust pipe along with carbon over time. If the exhaust pipe is clogged, your scooter will run terribly or not at all. It can be difficult to tell if the exhaust pipe is clogged. The easiest way to tell is to remove it and try starting your scooter. It will be a bit loud - two strokes will sound like a chain saw. If it runs with the exhaust pipe off, you know that is the problem

hope this helps

John

Aug 21, 2011 | Eton JC 125 B Motorcycles

1 Answer

My 98 wr 250 wont hit band properley ive changed the plug cleaned the carby and still the same starts perfect takes off just wont hit band properly


Be sure the exhaust pipe is not partially plugged up with dirt. If not, remove the exhaust pipe and go for a quick ride down the street. If the power band is back, the pipe has an internal blockage. If not, then remove the carb and air filter for cleaning. If no luck then pull the head and run the piston to the bottom. Check the exhaust port for carbon build up. Clean out any build up with a screw driver, preferably from the exhaust side. Decarbon the head and the top of the piston and reassemble top end and exhaust pipe. If still no joy, the crank seals, (and possibly the crank bearings) probably need to be replaced.

Jan 02, 2010 | 2003 Yamaha YZ 125

1 Answer

MY YZ250 WONT REV PAST 3/8 THROTTLE. I NEED HELP!!


It does sound like an ignition timing problem, but could also be a breathing issue, air flow in or exhaust flow out could be restricted i.e.:dirty air filter, excessive carbon build up in exhaust pipe from burning too much oil or rich fuel mixture.
possibly and more likely some junk got into your fuel system and partially plugged up the main jet in the carb, -or has the needle on the slide been moved? The little circlip at the top of the needle, if it has one.
1.Replace the spark plug, check gap, check spark, it should be bright blue and fat.
2. check the fuel filter, if no filter check the carb for dirt.



Jan 19, 2009 | 2004 Yamaha YZ 250 F

1 Answer

Sparks and burning from exhaust, no control over speed.


You have a unique problem caused by excessive oil and carbon build up. The sparks are from excessive oil burning, as is the smoke, and not being able to shut the engine down or contol it is called pre-ignition. There is so much carbon built up inside the combustion chamber it is acting like a glow plug when it gets red hot.

Beyond that I can't say how or why you are getting the excessive carbon build up, other than from the oil.

Double check the oil level. Maybe somehow the engine is being over filled?
Bill

Nov 17, 2008 | 2004 Yumbo Dakar 200

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