Briggs and stratton engine that smokes only when you first start it up what cause this?

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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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What would cause a Briggs and stratton 4.5 HP lawn mower from starting?

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 ( Full Answer )

Why does a 22 hp Briggs stratton engine smoke when started?

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 ( Full Answer )

What will cause compression lock up on a Briggs and stratton lawnmower only when spark plug is in?

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 ( Full Answer )

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 ( 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 ( Full Answer )

How do you time a 10 Briggs and stratton engine?

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 ( Full Answer )

Are there points on a 16.5 Briggs and stratton engine?

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.

Briggs and stratton 5 hp engine backfires thru carburetor while starting it?

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 ( Full Answer )

Engine only smokes at start up?

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 ( Full Answer )

Why won't your Briggs stratton start?

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 ( Full Answer )

Why Wont 5hp Briggs and Stratton start?

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 ( Full Answer )

Why will the Briggs and stratton 20 hp engine not start?

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.

What is the compression of a 3hp Briggs and Stratton engine?

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.

Why does your Briggs and stratton 6.75hp lawnmower have white smoke?

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 ( Full Answer )

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 ( Full Answer )

Where is Briggs and stratton engines made?

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 ( Full Answer )

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 ( Full Answer )

Why will my Briggs and Stratton 14.5 engine not start?

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?

What is the hp of a 250cc Briggs and stratton engine?

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.

Why does Briggs and stratton 5.5hp snow blower engine only runs with choke on?

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 ( Full Answer )

What causes smoke when start engine?

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 ( Full Answer )

How do you find what the hp of a Briggs and Stratton Engine is?

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 ( Full Answer )

How do you adjust valves on a Briggs and stratton engin?

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.

Why does your Briggs and Stratton emit white Smoke and burn oil?

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 ( Full Answer )

Why does your Briggs and stratton lawnmower engine smoke?

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 ( Full Answer )

How do you replace alternator on a Briggs and stratton engine?

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 ( 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 ( Full Answer )

What is the hp of a 342cc Briggs and stratton engine?

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.

Why will the engine only run when you pour gas in the carburetor of the Briggs and stratton engine?

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 ( Full Answer )

When did Briggs and Stratton make their first carburetor?

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.