Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas…
Lawn mower does not appear to produce a spark
Experienced gardeners share their insights in answering this question :
Check the fly wheel and coil it may have rust on it if so sand it off
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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.
Your lawn mower turning over but not starting due to several reasons, such as a faulty or disconnected plug, a disconnected spark plug wire, a clogged air filter, or a contaminated fuel tank. A faulty carburetor, a dirty cutting deck, or a dysfunctional flywheel brake can also cause this.
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.
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.
The most likely cause of a no-start mower after running out of gas is dirt in the carburetor, but other possible causes include: Air locked gas system. Faulty carburetor. Contaminated gas.
Your Mower Won`t Start:
Other possible causes include: Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas.
The easiest way to tell a 2-cycle engine from a 4-cycle engine is the number of fuel tank and/or oil sump fill ports. A 2-cycle engine has one fill port with a cap that has fuel pump and oil can icon. The cap will usually state the oil to fuel mix ratio.
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An engine that will fire and run with the choke closed but dies when the choke is opened likely has debris at least partially blocking the fuel passages in the carburetor. In this condition the closed choke provides enough extra fuel to enter the engine to overcome the lack of fuel flowing through the other passages.
Discover Relevant Questions and Answers for Your Specific Issue
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What kind of oil does this machine take? – Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower
ANSWER : Hi, sae 30 mineral oil. Regards Phil.
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My lawn mower briggs & stratton engine 650 series will not start
ANSWER : Check the fly wheel and coil it may have rust on it if so sand it off
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My Toro mower with a Briggs & Stratton engine starts and then cuts off after a few seconds. How do I fix this?
ANSWER : If it starts on choke and then stops may need to clean out carby and fuel tank
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How to get a rusty lawn mower blade off? – Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower
ANSWER : Many times the bolt that holds the blade in place is seized so I some time use a vice grip and snap on the blade so it won’t turn and put a piece of pipe on my ratchet or Johnson bar and put extra pressure to turn the bolt out. Don’t put so much torque you wreck your ratchet. I have taken many off that way. Heating does help sometimes. I had one that I used a hammer and hit the Johnson bar with sharp hits when you put presser to turn out. that worked also.
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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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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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I have a Briggs&Stratton 625 190cc lawnmower(petrol). it runs fine BUT when I stop – it will not restart. It usually takes about 30 minutes before the engine will start again. Any idea where I might be going wrong ?
ANSWER : The tempature might be evaporating the fuel, try priming it before starting it again
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My lawn mower starts up but seems like it has no power to rotate the blade. Added oil, replaced air filter and the spark plug but still has no output power.
ANSWER : Is the choke stuck on? That could do it. Does it rev high enough ? May need adjusting. You say you added oil was it low enough you have almost seized the engine. Just a thought
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