Experienced gardeners share their insights in answering this question :
Vibration is usually an indicator that something is out of balance.
I would recommend removing the engine shroud so that you can clearly see the outside edges of the flywheel. Rotate it and carefully check to see if there is any wobble present. If there is, remove it and install a new key, and then re-install the flywheel.
Odds are it will be cured.
How to Identify and Fix Common Gardening Problems ?
We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :
The most common cause of excessive vibration is an unbalanced blade. If you`ve recently had your blade sharpened, it`s possible the blade hasn`t been properly balanced during the sharpening process. To fix this, the blade should be removed, rebalanced and refitted.
Clogged or Dirty Air Filters
It is one of the most common problems that cause lawnmowers to sputter. The mowers take the air from the surrounding through air filters and mix it with fuel inside the engine. So, if the air filter is clogged or dirty, it will affect the flow of air into the carburetor.
If the mower vibrates when you engage the cutting blades, there might be a problem with the blade drive system. Deck vibration can be caused by an unbalanced blade, worn pulley or mandrel, bad blade belt or debris caught inside a pulley. Loose nuts or bolts on the pulleys, mandrels or blades can also cause vibration.
Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to run roughly. If the carburetor is clogged, try cleaning it with carburetor cleaner.
When your mower vibrates severely, start by checking whether the blade is damaged, imbalanced or loose. Tighten the blade bolt if it`s loose. Replace the blade if it`s damaged. A rough-running engine can also cause severe vibrations so tune up the mower to cure engine vibrations.
A sputtering engine is a sign of a lean fuel mixture in the combustion chamber. This can happen if you have a clogged somewhere in the fuel system that impedes the delivery of fuel into the chamber. For example, your fuel filter or fuel lines might be clogged.
One of the more serious noises is a rattling sound, as this can signify that you have loose parts that might come dislodged. The minute you hear rattling, it is imperative that you tighten the blade, flywheel, and other parts.
If the engine runs rough after hitting a rock or stump, check the flywheel key-a damaged flywheel key will disrupt the ignition timing. Check for fuel, oil or carbon deposits on the spark plug. Replace the spark plug if it`s fouled. Bad fuel causes a rough-running engine.
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
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.
Oil quanity I have 20 hp craftsman briggs and stratton twin how much oil when you change out oil
Wshat is the valve clearence for a 24 hp briggs and stratton engine model 446677 type 0470E1 code 050405yh
About a mm or .004″.
Will only run with the choke half on – Briggs & Stratton Lawn-Boy 10640 20-Inch 6.5 HP Gas Powered Lawn Mower
The carb is blocked. Remove the barb take out the main jet blow out the holes and make sure they are 100% spotless rebulid clean out your filliter and that should sort your probleml davidson lawn mower tech
How many cycles is a 6.25 hp Briggs & Stratton engine ?
What oil do you use in the YT4000 lawn tractor with 24 hp v-twin
My 24hp Briggs and Stratton ohv engine has bent push rods on one side. The top valve can be pushed in but the bottom one will not push in. Is the valve stuck in the open position? If so how can it be fixed?
Unable to answer if valve opened or not but does sound like ur bottom valve is bent or piston made contact and bent it to fix need to remove head and replace valve also need to inspect piston face is not damaged from possible contact
42′ Poulan 20 hp-I was mowing & there was a loud pop,mower ideled down & quit. It will turn over but won’t start.
Check compression, should be over 90psi to start. And check spark. The loud pop I am going to assume came from the exhaust, which if you lost spark would cause excess gas to ignite. Causes of no spark, bad coil, or defective and or damaged safty swith.