Question about 2005 Suzuki Boulevard C50

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Mixture too rich at low speed, won't tick over, black sooty smoke coming out with a strong smell

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Set carb float

Posted on May 28, 2009


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Why is my cub cadet xt1 blowing black smoke cleaned air filter made sure oil level is correct.still blows black smoke

Make sure that at full throttle the chock is not being used. Black smoke coming out of the exhaust of gasoline engine is a sign of a rich fuel mixture (too much fuel, not enough air). A brief puff of black smoke may be visible during hard acceleration when the fuel mixture goes momentarily rich, but under normal running conditions and idling the exhaust should be transparent. If black smoke is visible all the time and the inside of the muffler is coated with heavy black carbon deposits, it would tell you the engine has a rich fuel condition.
On engine, a rich fuel condition and black smoke can be caused by a stuck or maladjusted choke, a leaky metal or hollow plastic float inside the carburetor fuel bowl, or a fuel saturated foam plastic float, or an incorrectly adjusted float (set too low). A trestricted fuel filter may also contribute to a rich fuel mixture.

Jul 04, 2017 | Cub Cadet Garden

2 Answers

Black smoke comes from exaust when I start. Could it overfuel and how can I fix it if its a new carb on my 88 2e 12valve

assuning there is nothing major wrong, get some forte injector and use it as recommended. I once had a renault laguna diesel fail an MOT test, a roadworthiness test that is, on was absolutely chucking out black smoke but the engine ran well. I put 2 bottles of injector cleaner in the half full tank and went out for an eighty mile drive revving the engine in the lower gears. I returned to the testing station an hour and a half later and the engine was running perfectly.
Alternatively, assuming the engine runs well but is just a little smokey, have it terracleaned, this will remove most of the carbon deposits from the engine/exhaust and should increase the life of your engine simultaneously improving fuel economy

Oct 26, 2015 | Cars & Trucks

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Why is a very strong gas smell coming from my tailpipe?

White smoke is water vapor and in this cold climate it is normal. Strong gas smell is not normal although you may smell some while engine is warming up. Bad cat converter can produce smells, but usually more like rotten eggs. If engine is running rough and seems rich, check coolant temp sensor. Bad converter can cause stalling too. Otherwise, idle speed is controlled by idle air contol motor which can get dirty and stick. Any codes set?

Feb 18, 2015 | Cars & Trucks

1 Answer

Why my toyota camry smoke at star up

The smoke might be white, blue, or sooty black.

If white, some such vapor is normal on a cold start, but lots and lots indicated a water leak into the inlet manifold or a cylinder, probably a gasket leak. If a head gasket leak, this would cause quick overheating.

If blue,this is oil smoke from worn piston rings or worn valve stem seals. Oil can also get into the inlet manifold via a faulty PCV valve. A compression check will tell you more.

If sooty black, this is over-rich fuel mixture, and may be due to a number of things, such as a faulty temperature sender, a faulty fuel pressure regulator, or a stuck-open injector.

Jun 08, 2014 | 1993 Toyota Camry V6

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Black smoke from exhaust

$1500 spent on what , if I may ask? Obviously a rich mixture, but need to know what was done for $1500, plus year , make and model of Chassis, and engine size.

Mar 23, 2013 | Cars & Trucks

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My wind bike seems to be having more black colored smoke emissions? whats the problem? the valve was mop already and adjusted.

I am not familiar with your Baja Wind 125 motorcycle, however, normally, black smoke is associated with too much unburned fuel in the exhaust - too rich a mixture. Is your choke fully open when this is happening? Are yo usure? Remove and examine your spark plug(s). I expect they will be sooty sooty black. Is your air filter clean, the air path completely unobstructed? Have you messed with the fuel adjustment? (I am not familiar with the term 'mop') Is your bike equipped with a Cat Converter? If so (not likely ...) it may have to be cleaned or replaced.

Some times, black smoke or sootie plugs results from using too low a gear, not running the engine fast enough for the riding conditions. Usually, the engine will buck if you are expecting too much from it by being in too high a gear. This is a very rare condition, having too low RPM for conditions.

FYI, Black smoke = too much fuel, Gray or Blue smoke = burning oil (worn rings?), White smoke (in water cooled engines) = water in the oil, blown head gasket or other trouble.

If your bike was recently serviced, I suggest you return to the mechanic and have them take another look at your motorcycle. If not, this may not be a bad idea anyway. You do want your motorcycle to perform optimally, right? Best ride and economical operation = most fun.

Some other things you can try, get a hotter plug. Replace the air filter.

I hope this helps you with your Black Smoke issue.

Thanks for your interest in

Jul 18, 2011 | 2006 Bajaj Wind 125

1 Answer

Spark plug always dirty

You have posted your query in the wrong area, this area is for computers etc.
Anyway, if the spark plugs are black and sooty and your exhaust is blowing black smoke then the fuel mixture is too rich, The carburattor need to be tuned/adjusted so the fuel mixture is running leaner.

Aug 06, 2010 | Computers & Internet

2 Answers

My 1997 Saturn SL1 exhaust smells like rotten eggs, even after being driven 20 miles. It had sat for a while before today, when I bought it. Oxygen sensorwas replaced yesterday, and otherwise, it runs...

replace your catalytic convertor. you can go to a smog shop and have them perform a "cat efficiency test" and see what they tell you or simply go to a muffler shop have them install one.

Nov 03, 2009 | 1997 Saturn SL

1 Answer

Having trouble with my honda 2001 cbr smoke coming out of exhaust pipe

There are several possible causes; fuel mixture is too rich, air filter is clogged, or worn piston rings and/or valve guide seals. The latter, however, will most likely produce blue smoke - under acceleration means worn rings, blue smoke under deceleration means bad valve guide seals. Also make sure that the crankcase vent is not obstructed as this will tend to force oil up, past the rings and into the combustion process.

Generally, an examination of the spark plugs will give you a good clue as to what the offender is. Black, sooty spark plugs indicates too much fuel (clogged air filter or mixture too rich). Oily spark plugs means worn engine parts, as mentioned above.

Oct 27, 2009 | 2001 Honda CBR 929 RR Fireblade

3 Answers

What would cause smoke to come out the exhaust pipe


Sep 28, 2009 | 1998 Chrysler Sebring

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