Briggs & Stratton
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Disconnected, dirty or fouled spark plugs are common causes for engines that won`t start. For small engines, spark plugs typically need to be replaced every season or after 25 hours of use. You should also check to make sure the spark plug gap is set correctly.
If the plug is clean or you`ve replaced it and the mower still won`t start, the issue could be a lack of fuel. Either the carburetor is dirty and not able to mist the fuel to be mixed with incoming air, or no gas is getting to it to begin with.
A dirty carburetor is one of the most common causes for a lawn mower not being able to start after sitting unused for months or years at a time.
Check the Fuel Filter
To start, tap the side of the carburetor to help the flow of gas. If that doesn`t work, you might have a clogged filter. Not all lawn mowers have a fuel filter, but for the ones that do, it`s usually located in the fuel line or the fuel tank.
When your engine cranks but won`t start or run, it could mean your engine is having trouble producing a spark, getting fuel, or creating compression. The most common causes are problems in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter).
If your carbureted engine turns or cranks but won`t start, there`s not enough fuel or spark. Here`s what could be causing your engine to crank: Bad crankshaft position sensor. Clogged fuel injectors.
This is typically the result of a lean fuel mixture, which means too much air and not enough fuel. A weak accelerator pump, worn throttle shafts, or dirt inside the carburetor are a few of the problems that might be causing the poor air/fuel mixture.
A Dirty Carburetor Can Cause a Lawnmower To Start Then Die
By far, the most common issue that causes a stalled motor is a dirty carburetor. The carburetor on your engine is the thing that draws in air and mixes it with the fuel. Contrary to what the movies might make you think, gasoline itself is not very flammable.
Possible cause 1: In some models, when you tip the mower, fuel can leak into the carbon in the cap, which restricts the venting of the fuel system. This can cause the engine not to start, or only run for a few minutes, then quit. POSSIBLE SOLUTION: Leave the cap to dry out or replace it with a new lawn mower cap.
If your Briggs & Stratton engine has a spark but won`t run, then it is most likely a problem with the gas or air intake in the engine. The spark on the spark plug ignites the gas in the piston, but if the air filter is clogged or the gas can`t flow, then the engine won`t start.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
How do I remove and clean air filter? – Briggs & Stratton Lawn-Boy 10640 20-Inch 6.5 HP Gas Powered Lawn Mower
ANSWER : There should be a square of plastic on the side of the engine which is opposite of the muffler. It has a small hex head with a slot cut in it. Remove this plastic cover and the air cleaner should be inside of it.
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Help with the lawnmower. It starts and stalls after a few seconds
ANSWER : Check the fuel system clean the carb .
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17hp b/s intek OHV after 30 min mowing starts running rough
ANSWER : If gas is in the oil the needle and seat in the carb are bad or some thing in it. the gas will go in to the crank case and load the cylinder with gas. you can take the carb apart to see if something is in the seat. or replace the carb
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What Gap for spark plug on 3.5 hp engine? – Briggs & Stratton Briggs Stratton Lawnmower Lawn Mower Short Block
ANSWER : .030 or 76 MM
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Oil quanity I have 20 hp craftsman briggs and stratton twin how much oil when you change out oil
ANSWER : Usually 1 qt
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I have a 12.5 Briggs & Stratton and I can not get the timing marks on the crankshaft and cam gear to line up when the piston is at top dead center.
ANSWER : Timing on briggs is piston past tdc by 6mm….also see if you are 360deg out?
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Hi there, quick question, there is a black and grey wire on the 13.5hp briggs and stratton, i am unsure which is the earth and which is the power?
ANSWER : The grey one should get power when the key is turned on. This opens the solenoid valve on the carb and lets fuel in. The black one should get earthed when the key is turned off, this shorts out the coil and stops the spark. Aussie Steve.
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Front propulsion not engaging – Craftsman 675 Series 190cc 22" Briggs Stratton Rear Bag Front Propelled Lawn Mower ()
ANSWER : This is probably a belt driven machine…remove the cover. (could have Torx screws). and see if the belt is on the lower engine pulley and is on the pulley to the drive transmission…If OK, then check the action of the spring that helps engage the transmission.
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