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Help Revive a Lawn Mower (and other equipment) that Runs Rough

lawn mower needs AMSOIL or maintenance if not kept up

Help Revive a Lawn Mower (and other equipment) that Runs Rough

Judging someone’s character can be boiled down to this key question: do they love going to the dump?

An affirmative answer indicates a visionary – one who sees a fashionably distressed dining set where others see a worn out table and chairs. One who sees the south wall of their new chicken coop where others see dusty old windows. One who sees his new (free) rolling shop stool where others see a ratty office chair.

Why drop $50 on a shop stool when you can get a sweet unit like this free at the dump?

So, while I salivate at adding a lawnmower, snowblower or other piece of equipment from the dump to my family fleet, I also burn with shame toward my fellow man for discarding something that might have been easily repaired.

There has to be a better way

One of the biggest reasons people junk their lawnmower, string trimmer, chainsaw or other equipment is because it starts hard and runs rough. A dirty carburetor is often to blame.

Over time, oxygen deteriorates the gasoline in the carb, leading to the formation of varnish and other deposits that stick the float, block the screens and plug the tiny fuel passages. The result? Fuel that doesn’t flow properly and an arm nearly ripped from its socket from fruitlessly yanking the starter cord.

Engine deposits are another problem

The combustion chamber grows intensely hot during operation. The heat breaks down motor oil, creating carbon that can lodge in the ring lands and cause the piston rings to stick. Stuck rings reduce engine compression, which makes starting more difficult and reduces engine power.

Gasoline byproducts can form deposits on the piston crown, which can lead to pre-ignition. That’s when a super-heated chunk of carbon ignites the fuel/air mixture before the spark plug fires, causing a shock wave in the cylinder that can lead to piston damage.

In two-stroke engines, deposits can block the exhaust port or spark arrestor screen, choking off airflow and leading to rough-running. If bad enough, the engine will quit running altogether.

String trimmer exhaust port plugged with carbon deposits, causing it to run poorly.

An effective way to prevent hard-starting, rough-running equipment is to treat gas with gasoline stabilizer prior to storage and to periodically clean the carburetor and combustion chamber with a good fuel additive. Otherwise, you’ll find yourself at the dump paying to dispose of your lawnmower, snowblower or other equipment while people like me lie in wait, rubbing our hands together with glee.

If your engine and carburetor are already dirty and causing grief, clean them with AMSOIL Power Foam. It’s a potent cleaning agent that…

  • Cleans deposits from ethanol and degraded fuel
  • Removes gum and varnish
  • Maximizes horsepower
  • Restores startability
  • Helps improve fuel economy
  • Reduces pollution

It will not damage seals, gaskets, rubber or plastic materials commonly used in gasoline engines.

I’ve tried it a few times on my lawn and garden equipment, and it’s pretty simple to use. Just run the engine to normal operating temperature, remove the air filter and spray Power Foam into the intake as fast as possible without stalling the engine. You may have to rev the engine to facilitate the process. Make sure you’re in a well-ventilated area because an impressive volume of smoke will emit from the exhaust.

Then, shut off the engine and let it sit for 10-15 minutes.

While you’re waiting, Power Foam‘s potent formula attacks and loosens the built-up carbon and varnish, helping free stuck rings, clean the valves and piston crown, and remove varnish from the carburetor. If the engine is especially dirty, you may want to repeat the process.

Replace the air filter, start the engine and pat yourself on the back for helping prevent the addition of one more perfectly usable piece of equipment to the local dump.

It may be unfortunate for scavengers like me, but it’s great for your wallet.

And here’s another Sioux Falls secrete for you lawn care customers!! A frequent weedeater problem easy to repair.

Premium Protection for Lawn and Landscape Equipment

Lawn and Landscape Equipment manufactures make Equipment – AMSOIL makes the Lubricants to make them Last Longer

Premium AMSOIL synthetic lubricants help lawn and landscape professionals succeed by preserving the power of their equipment and extending equipment life, allowing them to work more efficiently and save money. Extensive equipment testing demonstrates the superior protection and performance provided by AMSOIL SABER® Professional Synthetic 2-Stroke Oil (ATP) and Formula 4-Stroke® 10W-30/SAE 30 Synthetic Small Engine Oil (ASE).

Depend on AMSOIL for the premium value and performance for your equipment. OEM’s who make the best equipment are not in the business of making oils specific to their needs. Brand labeled aftermarket lubricant & maintenance products all have a catch. They must be profitable and to have application and brand specific blends can become quite costly so they are generally made with base oils which do a ‘OK’ job as long as the use is under normal stress. AMSOIL not only builds oils to exceed even the highest commercial stresses but they use only the premium base oils and additives packages available which are market specific. So the operator can have a product not only made for their equipment but will be certain it will outlast the normal expected life and them some. AND know that the AMSOIL product will even go the distance when unforeseen factors may normally render the end of the equipment life whether that be in storage, abuse or lack of maintenance.  AMSOIL Synthetics have you covered.

100:1 two cycle oil

Two-Stroke Power Equipment Testing

Carbon buildup severely affects the performance of two-stroke lawn care equipment, causing stuck rings and plugged exhaust ports and screens. The end result is power loss, smoke, rough running and hard-starting that frustrates workers, increases the need for equipment maintenance, contributes to early equipment failure and hinders the ability to efficiently and profitably deliver professional-looking lawns and grounds.

Outstanding Protection for Two-Stroke Power Equipment

Formulated with top-grade synthetic base oils, super-high lubricity and concentrated active cleaning agents, AMSOIL SABER® Professional Synthetic 2-Stroke Oil (ATP) effectively combats carbon buildup, providing outstanding protection and peak performance for the life of the equipment, keeping it on the job and contributing to the bottom line.

Preventing Stuck Rings

lawn1Following 300 hours of professional-use testing in Stihl* string trimmers at the manufacturer mix ratio of 50:1, SABER Professional kept pistons and rings virtually free of carbon and wear (see the picture on the left), while use of a leading oil brand caused significant carbon buildup around the ring area (see the picture on the right). This engine is nearing the failure point.

Fighting Exhaust-Port Plugging

After 300 hours of simulated severe use compare exhaust ports on this 2-cycle engineAfter 300 hours of simulated severe use while running SABER Professional, the exhaust-port on the left exhibited virtually no signs of blocking. In contrast, after 300 hours of simulated severe use while running a leading oil brand, the exhaust port on the right exhibited severe exhaust-port blocking. This engine barely idled at the end of the 300-hour test.

Preventing Spark Arrestor Screen Plugging

Using SABER Professional, the screen on the left did not require cleaning following 300 hours of severe-service testing.Exhaust gases flow through the spark arrestor screen (located directly on the muffler), which is prone to plugging. Using SABER Professional, the screen on the left did not require cleaning following 300 hours of severe-service testing. In contrast, using a leading oil brand, the screen on the right plugged after only 45 hours of runtime and required repeated cleaning throughout the test.

Four-Stroke Equipment Testing

Zero-turn mowers face high ambient temperatures that accelerate oil breakdown, leading to varnish and carbon deposits that stick rings and exhaust valves. This results in compression and power loss, smoke, increased maintenance and early equipment failure, all of which hinder efficiency and profitability.

Average SAE-30 oil depositsOutstanding Protection for Zero-Turns and Other Four-Stroke Equipment

Formulated with low-volatility synthetic base oils, a heat-stable additive system and concentrated carbon cleaners, AMSOIL Formula 4-Stroke® Synthetic Small Engine Oil (ASE) effectively resists oil breakdown and damaging deposits, providing outstanding protection and peak performance for the life of the equipment, maximizing productivity.

Preventing Exhaust Valve Sticking

Following 125 hours of severe-service testing in a Honda* 5 HP engine, Formula 4-Stroke Synthetic Small Engine Oil kept the valve guides in the engine pictured above left clean and functional. In contrast, using a leading oil brand, the engine pictured below left failed due to exhaust valve sticking. During engine dis-assembly, heavy deposits prevented test administrators from removing the valve.

Fighting Carbon Buildup

Pistons and rings virtually free of carbon and wear. Keeping piston ring and land areas clean is critical to maintaining the power and performance of zero-turn mowers. Following 500 hours of severe-service testing in the Kawasaki* FX 730 V engine, Formula 4-Stroke Synthetic Small Engine Oil kept pistons and rings virtually free of carbon and wear.

Sioux Falls AMSOIL – The Synthetic Warehouse – your lawn equipment lubricant HQ

We keep several products for your home lawn equipment and commercial enterprise. 2-cycle, 4-stroke, hydraulic oils, oils for hydro-static systems, water resistant grease, fuel and ethanol additives (stabilizer, intake “power Foam” cleaner, diesel fuel concentrate), tractor, skidsteer, bar and chain oils and more. Come in to Sioux Falls’s #1 Synthetic Oil Superstore and find something for all your equipment or just pop in for our informative color catalog!
Call anytime with tech questions at 800-579-0580 or the local store 402-933-3902.
We are at 4610 W. 12th St right across the street from the QT Fuel Stop and