Question about Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

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Engine smoking, blue smoke - Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

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suzukiracing
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SOURCE: enigine smokes after 15 minutes use, blue smoke

The piston rings are probably worn in the motor.

Posted on Jul 20, 2010

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I have a Brute Force 750, starts OK but runs rough after a few minutes, will start smoking a smelly black/gray smoke, and most recently some blue smoke.


When the head gasket fails on a liquid (water) cooled engine the typical smoke colour is white (steam) and that becomes rather underlined by the steady drop of the coolant level and often clear evidence combustion gas is leaking into the cooling system.

Smelly black/grey smoke tends to be produced by an over-fuelling condition such as a stuck choke or strangler or other cold starting aid or perhaps carburettor flooding.

Blue or blue/grey smoke is invariably engine oil burning but I suggest you ignore that until the black smoke problem is rectified and after a short time the blue smoke might also disappear. If it doesn't it could be related to the overheating but the black smoke probably wasn't caused by that...

Mar 18, 2017 | Cars & Trucks

2 Answers

Why is my 2000 kia sephia blowing blue smoke from the tailpipe. it has 86,000 miles. the check oil warning light is on even though the dipstick reads full.


The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. This is most frequently seen in older or high mileage cars with worn seals and gaskets. It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke.

Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.

Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak. Internal engine oil leaks can also allow fuel to mix with the oil in the crankcase which will degrade the oil and prevent it from adequately protecting the engine.

Operating a car with a severely dirty oil filter, air filter or improperly functioning PCV valve can also sometimes result in engine oil blow-by, oil loss and blue exhaust smoke. Periodically checking the engine oil level with the oil dip stick will indicate if there is excessive oil consumption. Higher viscosity engine oil can sometimes temporarily reduce the amount of blow-by; however, this is not generally recommended. Excessive blue exhaust smoke indicates a possible internal engine oil leak that should be inspected by an ASE certified mechanic.

Dec 08, 2014 | 2000 Kia Sephia

1 Answer

Low power, blue smoke, engine cutting


blue smoke indicates oil is burning in the cylinders. This is either leaky valve seals, (little blue smoke when engine first starts, but stops smoking shortly after) or the worse problem, worn rings. What happens is when your rings are worn, they let oil get past the rings and into the combustion chamber, AND it also lets out your combustion pressure (your power source) into the crankcase, so you have considerable power loss. Only way to fix worn rings is to rebuild the engine, as just replacing the rings would require complete teardown of engine anyways, and who wants new rings in a worn out motor.

Dec 17, 2013 | 2006 Volkswagen Jetta

1 Answer

Smoke engines


Smokes can be of three colors.
1. White smoke.
Excessive white smoke reveals presence of water in fuel, thermostat valve stuck open, or burnt cylinder head gasket.
2. Black smoke.
Black smoke could be observed due to the unburnt fuel or higher percentage of Hydrocarbons during the combustion process, defective regulating valve, ruptured PCV valve, low fuel pump pressure, defective charcoal canister, ruptured or leaking fuel injectors.
3. Blue smoke.
Blue smoke reveals the engine failure.

Jun 24, 2013 | Toyota ECHO Cars & Trucks

1 Answer

Blue Smoke .... Faulty PCV ???


does the engine idle smoothly? is the service engine soon light on? the engine is running rich causing the blue smoke.it could be pcv valve but unlikely

May 23, 2012 | 2002 Ford Explorer

2 Answers

Why engine exhausted blue,black and white smoke


ENGINE SMOKES BLUE THE ENGINE BURNING OIL DUE TO WORN PISTON RINGS , WORN VALVE GUIDES AND SEAL./ ENGINE SMOKE BLACK ENGINE GETTING RICH FUEL MIXTURE CAUSED BY DIRTY AIR FILTER, WEAK IGNITION SPARK, FAULTY FUEL PRESSURE REGULATOR OR LEAKING FUEL INJECTOR, EVAP CANISTER GAS SOAKED./ ENGINE SMOKING WHITE ENGINE BURNING ANTIFREEZE DUE LEAKING INTAKE GASKET OR BLOWN HEAD GASKET. IF ENGINE HAS A LIGHT WHITE BLUE SMOKE ENGINE BURNING TRANSMISSION FLUID DUE TO A RUPTURE VACUUM MODULATOR DIAPHRAM ON TRANSMISSION.

Nov 20, 2010 | 2003 Hyundai Accent

1 Answer

CHUCKS OUT CLOUDS OF BLUE SMOKE.


Blue Smoke: Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. As with the white smoke, just a small drop of oil leaking into the cylinder can produce blue smoke out the tailpipe. Blue smoke is more likely in older or higher mileage vehicles than newer cars with fewer miles.

How did the engine oil get inside the cylinder in the first place? The car has many seals, gaskets, and O-rings that are designed to keep the engine oil from entering the cylinder, and one of them has failed. If too much oil leaks into the cylinder and fouls the spark plug, it will cause a misfire (engine miss) in that cylinder, and the spark plug will have to be replaced or cleaned of the oil. Using thicker weight engine oil or an oil additive designed to reduce oil leaks might help reduce the amount of oil leaking into the cylinder.

Jun 07, 2010 | Fiat X1/9 Cars & Trucks

2 Answers

Lancia Thema 16v turbo series 2 is smoking with blue smoke


if the blue smoke is constant then it is valve seals and guides, if it is only after depressing the throttle then it is the rings

Jul 28, 2009 | 2007 Lancia Beta

5 Answers

Blue smoke coming from exhaust


blue smoke out of 1.8 turbo its allways bad oil seal inside turbo.need new turbo or rebuild OEM. with 24 years experience working with vw never seen single headhasket go bad on 1.8 turbo engines.blue smoke its 100% turbo every time

Jul 17, 2008 | 1999 Volkswagen Passat

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