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If you store equipment with untreated gas in the tank, it can lead to engine damage.

Small Engine Problem Solving Tips

Air-fuel compression is crucial to engines powering lawn mowers and outdoor power equipment. Check that the valve spring still has tension.

If you store equipment with untreated gas in the tank, it can lead to engine damage. Is the engine emitting black smoke? Clean spark plugs where statton Follow instructions for checking and changing spark plugs. Valves that stick or have leaks can cause an engine to stop running. Small Engine Problem Solving Tips.

Is your Engine’s Exhaust smoking? This is another common carburetor problem associated with overheating engines. Is the spark plug fouled? See Checking and Changing Mower Oil.

Troubleshooting small engine problems | Briggs & Stratton

Lawn Mower Oil – 18 Fl. Is the fuel tank vent or fuel tank screen plugged? Learn how to properly and safely use, troubleshoot, and maintain your lawn mower, tractor, snow blower, and other lawn and garden equipment.


Clean or replace the air filter. Is your fuel fresh? If the engine is emitting white or blue smoke, this means your engine is burning oil. The carburetor regulates how air and fuel move through the engine.

Follow along to troubleshoot and learn when it’s best to service your engine. Your oil wngine needs to be changed each season or after every tepair hours of use. Is you oil fresh? You should also check to make sure the spark plug gap is set correctly. Are the breaker points faulty? Carbon deposits can form on your combustion chamber. Always read the engine and equipment manual s before starting, operating, or servicing your engine or equipment to avoid personal injury or property damage.

Engine Stalling, Surging or Running Rough When your engine starts and stalls, it is often due to standard maintenance problems. Reference your repair manual, available for purchase. Is your carburetor clean? Start by checking your air filter, if it looks okay, move onto replacing the gas. These strxtton can range from a faulty spark plug lead, shorted kill switch or damage to the flywheel.

How do I troubleshoot & repair common small engine problems?

Stale, untreated erpair begins to break down after about a month. For rebuilding your carburetor, follow these steps. Find all Engine Safety Warnings. Is the engine dirty?

Is your oil fresh? Check your oil level and appearance every time you use your engine while it is cold. Prevent stalling problems before they start with a tune-up kit. The compressions system is made up of valves, piston, cylinders and rings that control how the air and fuel vapors move through the engine.


An improper spark plug gap could lead to engine knocking and poor performance. Is the valve clearance set incorrectly?

Is the valve spring weak? Drain the gas from your lawn mower or outdoor power equipment, and then replace with fresh gas and fuel stabilizer to extend the life of your fuel. Your oil needs to be changed every 25 hours of use or repaid. Stale, untreated gas begins to break down after about a month.

Valves let air in the intake valve and out the exhaust valvepistons move back and forth pushing the air-fuel mixture to the ignition system and the piston rings keep it all sealed up tight. You can perform a compression system with a leak down tester.

If your spark plugs look good, problems with your ignition system can also preventing a spark. Stale fuel, dirt and debris are the most common cause of outdoor power equipment not starting properly.