Briggs and stratton engine that smokes only when you first start it up what cause this?
If the engine is four-cycle, the valve seals may be worn, causing a small amount of oil to seep into the piston cylinder or combustion chamber. If it is two-cycle, the oil/fuel mix may have a little too much oil.
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If it will start but dies like it is running out of gas, it is most likely the small o ring that the float needle goes into. The new gas mixture that has been forced on that mixes alcohol in the gas and causes that o ring to swell and effectively shuts the gas off too early not allowing the float bo…wl to fill up. The cure is a carb overhaul kit for around $8. You cannot buy the o-ring separate and I have not found any substitutes that can handle this new federally mandated abuse forced upon us. After installing the new o-ring use sta-bill on the gas this supposed to help but I wouldn't count on it too much try to run the gas out of the carb or drain it if not being used for a long period. ( Full Answer )
We need more info on your particular engine. It could be anything ranging from adding too much oil, worn piston rings, or the fact that when the engine is started, the carburetor is being choked (cutting off much of the air supply) causing the engine to obtain air from elsewhere in the engine such a…s the crankcase or through leaking gaskets, etc.. ( Full Answer )
Answer . if it smokes just when started and then quits smoking, it may have to much oil in it, check oil level, if it keeps on smoking then you have a ring problem what TYPE of oil you have in it,. When they are shipped there is oil injected into the bores through the spark plug holes, this will… burn off for a while, so if it's new then it's no problem. ( Full Answer )
Answer . Probably has something to do with the compression release or valve adj. Look at troubleshooting in the manual.. You did not say if your lawnmower is gas or electric.. Problem (not starting) could mean the spark plug is fouled, improperly gapped, or damaged.. Does it crank but the eng…ine never catches? You didn't say. Is there an electric starter? Outlet might not be live - battery could be weak or dead or there could be bad connection or bad starter motor. ( Full Answer )
It is the whole assembly containing the pull start (if applicable) or the metal or plastic shroud surrounding the flywheel (it spins when you start the engine ).
My lawn mower smokes when it has too much oil in it or when the oil is watery. Try changing the oil.
What causes a mower engine Briggs Stratton 25hp to surge with gas and flood out after starting normally?
The engine is receiving more gas than it can consume. Sometimes the carburetor needle valve will vibrate to the open position or the float valve will stick open. Also, a fouled spark plug will not provide sufficient spark to ignite the fuel. Check out a lawn mowers and small engines repair manual fr…om your public library for troubleshooting and repair procedures. ( Full Answer )
Why does Briggs and stratton lawn mower engine start fine but then the idle goes way up and way down to a sputter?
there are many reasons for this , it could be running lean by the carb not adjusted right.look at the engine from the carb side.there are small rods that connect to a arm that goes back and forth as the load on the engine changes. this is the govenor arm. follow the rod to the throttle part of the c…arb when the engine is run ning, the rod will move and the govonor will move it. there is a screw that adjusts the amount of travle this govonor does. turn this screw in and the engine should have a better idle you want it to be steady and change when the mower deck is engaged or disengaged.this is the easy one b ut without seeing it or hearing it , this is the easyiest. after the idle is steady, the carb might need a adjustment for idle speed and enrichment. good luck, Erich ( Full Answer )
Timing on all Briggs & Stratton small engines is set at the factory and non-adjustable. It is determined by the placement of the armature (coil) and position of flywheel on crankshaft.. Unless the crankshaft is bent or the flywheel key is sheared (both are possible after an impact or sudden stoppa…ge), timing is perfect. Rough running is likely an intake or mechanical problem. ( Full Answer )
Nope. All modern B&S engines use Magnetron (R) solid state ignition. Check plug, wiring, armature (coil) air gap, flywheel magnet condition, flywheel key, etc. for no spark conditions. When all else fails, try a new armature ($$$). Timing is permanently set by factory.
I would check the flywheel key and see if it has sheared. On push mowers, the key can shear if you plug the deck, or if you hit a solid object like a tree root or stake. The flywheel key sets the ignition timing of the engine, and a sheared one will cause the problems you describe. You will have to …remove the shroud and flywheel to check the key. If you don't know how to do this, there should be some basic repair manuals at your local library or online. ( Full Answer )
As a first guess I'd suggest that you're getting a little "cylinder washdown", meaning that an injector or the carb is allowing too much fuel into one or more cylinders and it's picking up some of the oil. That can be caused by a carb with a sticking float that allows fuel to dump into the intake …after you turn off the engine... assuming that it's a carburated engine. OR an injector that's leaking a little and when you turn off the engine it's allowing the fuel to leak in much the same way. It could be other things as well but this is a more likely cause and certainly a good place to start. could be valve seals. oil left in the heads when engine is shut down gets by the seals when engine is stopped ,and leaks into cylinders. this is ONE thing that could cause it, I'm sure there are other causes, that are possible. ( Full Answer )
Why is my 21 horsepower Briggs and stratton engine in my Husqavarna riding lawnmower running rough with black smoke and gasoline being sucked up into air filter housing?
Black smoke means it's getting too much gas. Gas at the air filter also means that it's getting too much gas. The most likely cause it that the float valve is either sticking or has something stuck in it letting gas continually seep by it. Sounds like a good carb cleaning is in order.....
That's a tough question as there can be many of reasons WHY a small engine such as a Briggs & Stratton wont start. The usual problem on most small engine's such as this is a dirty carburetor meaning the fuel jets in the carburetor are clogged. Eaither that or if it is a diaphragm type carburetor, th…e diaphragm which acts as a fuel pump on small engine's gets hard because gasoline, expecially todays gasoline with the harsh E-10 and alcohol additives, eventually dry's this out to nothing short of the similar stiffness of cardboard, thus no longer can pump fuel. That is only one reason why a small engine wont start but 90% of the time, it is carburetor trouble. Another symptom can be a bad spark plug, a bad ignition condencer (engine dating pre-1985) causing a weak spark or in the case of an electronic ignition engine, (newer than 1985) a bad ignition coil. If you have hit something hard and/or the engine has taken an immidiate shock and died, you may also have a sheared flywheel key which will throw ignition timing off thus creating a "no start" situation. All above symptoms are easily repaired though if you are mechanically, somewhat mechanically inclined or even a fast learner. How about dirty fuel? I am trying to get my daughter's lawn mower running with a 6.5 HP B&S engine. She didn't run the engine dry last year and there was a combination of varnishy gas, water and gum in the float bowl. After cleaning everything up, it would start, but not run and then quit starting. I removed the spark plug and it still smells like varnish so I will drain the tank anew and put in new fuel. Next step is to drain the tank anew and replace with clean fuel. ( Full Answer )
Ok i had this motor on my go kart. i had a header on it and a fire sloted head also. i was driving it hard for awhile and the rod broke in 5 pieces and the piston warped and messed up the crankshaft . So i put new rings in it and a new rod and cranksaft. The motor has good fire and the valves are no…t sticking i tried pouring a little gas in the carb. the motor turns over good it ran fine before i blew the rod. I cant get the motor to start i have no idea why.the gas in the carb is oily to i dont know if its a valve guide or what. Could i have installed the rings wrong i have no idea,.... Any help would be appreciated ( Full Answer )
That question will need much more detail before it can be answered.. For an engine to run it needs fuel, air and spark. Without knowing which of these the engine has or does not have the question can't be answered.
Briggs and Stratton does not release specific compression values.. Anything above 120 psi should be just fine, around 90-100 and you're most likely due for a rebuild.. A better test is a leakdown test, with can help in determining where compression is being lost.
White smoke is usually an indicator of moisture/water in the system where the "white smoke" is actually steam. There may be heavy condensation or water inside the muffler and the heat of the exhaust is turning it into steam. You can remove the muffler and drain it or you can just let all the moistur…e/water evaporate eventually. ( Full Answer )
make sure to check the coil make sure youre getting spark to do that take out youre plug make sure you put coil wire on plug ground the plug pull recoil; if that's not it check to see if youre getting fuel
There is restriction of fuel flow somewhere. Look for a clogged fuel filter, a pinched fuel line, or debris in the fuel tank. Otherwise, the carburetor needs to be re-set.
What would cause a 15.5HP Briggs and Stratton OHV Engine to Idle fine but run rough and blow black smoke at any speed over an Idle?
Black smoke is an indication that not all the fuel that is entering the combustion chamber is being detonated. Three things to look for: (1) spark plug; (2) air filter; (3) carburetor adjustment.. If the spark plug and the air filter are clean and in good condition but the problem persists, rotate …the carburetor needle valve clockwise 1/8 turn for a slightly leaner air.fuel mixture. ( Full Answer )
The most comon cause of an engine that keeps revving up and down (aka surging) is a dirty air filter.
The most common cause of engine surging (rev up and down) is a dirty air filter.
Originally from when Briggs & Stratton started business in 1919, the engine's were built in Milwaukee Wisconsin to 1985 and well into the 1990's. Recently great production is very little from were Briggs & Stratton was originally started. These day's there is great activity of Briggs & Stratton part…s from China/Japan and Briggs & Stratton engine blocks being casted in Mexico. Truley a great devistation to a once GREAT engine. Which is why alot of people like myself will no longer recommend a Briggs & Stratton engine. Today your best bet is Kohler (still U.S. produced), Kawasaki or Honda. ( Full Answer )
14.5 hp Briggs and stratton engine the electric starter is messed up can you put a pull start assembly on it yourself how difficult and or expensive would this be?
Yes you can put a pull start on it.. Price is dependent on what type you get; the normal recoil type or the open pull rope type.. The recoil type will be hard unless it is pre-assembled (and you are good with following instructions) the rope type is pretty easy.
bad gas, dirty carb needs new sparkplug. youtube has repair vids on how to do what. user (davidsfarm) has great tips
What will cause a muffler to glow red immediatly after starting the engine on an 18 hp Briggs and stratton?
One of the cylinders is probably not firing. Try pulling a each plug wire alternately while the engine is running. One of them probably won't make any difference and the other will probably kill the engine. The one that does not make any difference is the one that is causing the trouble. You will ha…ve to find out why it is not firing.. What is happening is the cylinder that is not firing is letting the gas flow through the cylinder and into the exhaust where it is igniting in the muffler. ( Full Answer )
Briggs and Stratton 4.5 hp lawn mower starts easily enough but revs inconsistently and puffs black smoke what could the matter be?
Because of the inconsistant revving and the puffs of black smoke, I would say that the air filter is clogged and/or the spark plug needs replacing. Else, the carburetor is set too rich or the choke is sticking.
Depending on year and model of motor. : You will find the contacts either under the fly wheel or there will be a pick-up on the coil.
I have a 14.5 Briggs and Stratton engine on a Ranch King riding mower that will not start. After spraying starter fluid into the head, and air cleaner it fires for a second, but will not run. It is getting gas.....coil??? or something else?
Most likely it is the armature (coil) failing, though in limited circumstances it could be fuel-related.
Displacement and HP are only related to each other in a range because of engine variations. I agree but was curious how did you get the cc of a lawnmower? If it is a lawnmower the hp comes out with an educated guess of about 12 hp.
What causes a car to smoke blue only when started in the morning than will do fine after thatit will not smoke when driving or start up only on the first start up of the day?
I believe your valve seals are leaking until the engine warms up. On my 350 chev you had to take the spark plug out and pressurize the cylinder, remove the valve retaining clip and remove rubber valve seal and replace. The key is to keep pressure in the cylinder so you don't drop valve inside.
you need a new carburetor OR you might want to take it off and clean it. It might just be in need of a good cleaning. Somethin Else To Try Before you take off the carburetor, you might want to check the setting. Sometimes, the vibration will cause the needle valve to vibrate open or closed. H…ere is the procedure for setting the caruretor: The following procedure applies to all small engines If the engine does not start: (1) rotate the carburetor main jet needle valve clockwise (close) until it touches its stopping point - DO NOT FORCE OR GO BEYOND THE POINT OF TOUCHING as it may damage the tip. (2) Rotate the needle valve counter-clockwise (open) 1-1/4 to 1-1/2 turns - this should be close enough to start the engine. Start the engine and let it warm up about five minutes. (3) Rotate the needle valve clockwise (close) slowly until the engine starts to stall for lack of fuel, then rotate the needle valve counter-clockwise (open) slowly until the engine starts to stall from flooding (too much fuel). (4) Set the needle valve to a midpoint between the two extremes for the best "purr" of the engine. If the engine "sputters" when a load is added, open the needle valve an extra 1/8 turn for a slightly richer mixture. If the engine starts and you just want to adjust the carburetor, steps (1) and (2) are not necessary. ( Full Answer )
It can be caused by excess oil in you exhaust and also if you have diesel engine it is notorious for smoke. If it is only when you first start the car, the valve seals are leaking. When you shut the car off, oil that is on the valve runs down the stem of the valve and into the cylinder. When you s…tart it next time one or more cylinders have oil in them and it burns the first time that cylinder fires. There isn't enough leakage for it to smoke all the time while driving. ( Full Answer )
Why does Briggs and stratton 3.5 engine only stay started when starting fluid is sprayed in the carburetor?
Because your carburetor is not getting fuel to the engine - could be a plug in the fuel line or it could be dirt in the screen in the pick up tube in the carburetor. I would suggest you clean the carbutator.
On engine used only in warm weather use straight 30 weight. On engines used in cooler temperatures use 10W30 any major brand.
There no positive way, but you can get an idea from the Model number. It will be five or six digits. The last four describe carb, bearings, starter, etc. The first one or two are the cubic inches of the engine. Current decals are a torque ratings. You can also go to Briggs at the attached link with …the model number and see. ( Full Answer )
The valve clearance is set by grinding the faces if there is too much clearance or grinding the tip of the stem if there is too little. If it is a OHV engine you can easily adjust the valves. Try going to the link below for a video that shows how to adjust the valves.
White smoke is eaither a blown head gasket or you have water in the fuel system. This is not to be confused with flooding an engine and seeing white vapor coming out of the exaust in which that would NOT be smoke, it would be gas vapor's. If your burning oil, the smoke will be blue and smells of bur…nt oil. ( Full Answer )
Clean out the carburetor with gas, the reason it wont keep running is its not getting enough gas through the carburetor.
Black smoke= running to rich(too much gas) try replacing your air filter or your carburetor might be out of adjustment, choke might be on White smoke=burning oil. Make sure there isn't too much oil in the crankcase, use the proper grade oil- sae 30w. wore piston rings or scored cylinder wall. could… be a few more internal engine failures. ( Full Answer )
Yes, most all of the Briggs single cylinder engines are exchangable. You just need to be concerned to make sure that you don't under power your mower. In your case that is not a problem.
For most Briggs and Stratton engines the charging system is under the flywheel. You will have to remove all the shields that cover the top of the engine and the flywheel and then remove the flywheel itself. Once the flywheel is off the stator is exposed. Depending on what model you have there will b…e a series of screws that hold it to the block. Just unplug the wire connector and remove the screws and it will come off with a little wiggling. Make sure that all the magnets on the bottom side of the flywheel are in place and secure or replacing the stator will not do you any good. ( Full Answer )
What causes the engine to turn over like the battery is low on a 15.5 Horsepower Briggs and stratton overhead valve engine?
If your batt is fine it is most likely your valves, or specifically your exhaust valve. these engines have a tiny extra lobe on the exchaust valve cam lobe that acts as a decompression device at low rpm (under about 300 rpm) after the engine starts the pushrod just glides over it and does not matter…. to test remove your spark plug and crank the engine. if it cranks fine then it is your valves, if not it is your starter ( Full Answer )
Based on everything I have read from Brigs and Stratton, and talking with some small engine repair guys I know, the 342cc engine puts out about 11-12hp, and the 420cc engine is about 15hp. Hope this helps.
Check your timing if you have sheared a key on the fly wheel it might : 1.just work if the plug is out because it might just have enough friction to turn. 2.Your valve seals are letting oil threw and it is dead heading on compression stroke. The list goes on. Hope this helps.
if the engine only runs when gas is poured into the carb it is generally caused by plugged jets and/or stuck needle in the seat. if it has been sitting for a length of time the fuel has either crystalized causing the plugging or the ethanol has caused a problem. if it is a new unit, briggs recommend…s tapping the carb lightly with a hammer to loosen the needle in its seat. for one reason or another the engine is not getting fuel through the carb ( Full Answer )
Why does a Briggs and Stratton engine on a McLane front throw mower start fine one time and won't start at all another?
Might be in your ignition : lose wire, bad switch : when it won't start check for spark .
The earliest possible date that can be inferred from the company history is about 1918 or 1919. At this time they start to produce engines that powered washing machines and small personal vehicles.