Keep your Lawn
Mower in Top Shape for Easier Lawn Care
and a Healthier Lawn
when your lawnmower was brand new and started on the
first pull? Regular maintenance will keep your lawnmower
in top shape and running better longer.
Fresh Gas -- Fresh gas (87 or higher octane rated)
is critical to an engine's performance. To fill the mower's tank, use a clean funnel to
draw gasoline from either a one- or two- gallon gas can. Plastic gas cans are a good
choice because they won't rust. If you own a five-gallon gas tank, dispose of it properly;
the problem with a five- gallon can is that it provides the user with more than a 30-day
fuel supply. Gas that is older than 30 days may affect engine performance. Moisture
buildup and octane loss can lead to gum deposits in the engine's fuel lines and
carburetor, which can lead to poor engine performance.
Engine Oil -- Drain engine oil and replace it with
clean SAE 30 engine oil after every 50 hours of operation. Check the lubrication section
of your mower's owner's manual for specific oil recommendations.
Spark Plug -- Replace the spark plug after every 100
hours of operation. Spark plug type and gap can be found in the product specifications
section of the owner's manual.
Air Filter -- If the mower's air filter is dirty,
the engine may not run properly and may be damaged. Service the air filter after every 25
hours of operation or every season, whichever comes first. Remove the air filter cartridge
and gently tap it on a flat surface. If the filter is very dirty, replace it with a new
Mower Deck -- Disconnect the spark wire from the
spark plug and position it where it cannot come in contact with the spark plug. Clean the
mower housing thoroughly with soap and water, removing all dirt, grease and grass. For
heavy grass buildup under the mower's deck, use a scraper.
Blade Care -- For best results, lawn mower blades
must be kept sharp. Lawn mower blades can be sharpened with a file or on a grinder wheel.
Never attempt to sharpen the blade while it is on the mower. Special care should be taken
to keep the blade balanced. An unbalanced blade will leave an uneven cut on the lawn and
can eventually cause damage to the lawn mower or the engine. To check a blade's balance,
drive a nail into a beam or a wall leaving approximately one inch of the straight nail
exposed. Place the center hold of the blade over the head of the nail. If the blade is
balanced, it should remain in a horizontal position. If either end of the blade moves
downward, sharpen the heavier end until the blade is balanced.
Mulching -- Mulching is a great option to
economically and consistently fertilize the lawn. With mulching mowers, small particles of
grass are returned to the soil to biodegrade and serve as fertilizer. In fact, mulching
can contribute up to 25 percent of the lawn's fertilizing requirements. When mulching, cut
only one-third of the grass's height.
Engine -- Clean dirt and debris from the engine air
screen and the engine's cylinder fins.
Power Propelled Mowers -- Replace any worn or
damaged belts. To keep the driver system working properly, check the gear case and area
around the drive system. It should be kept clean and free of grass and dirt buildup. Clean
under the drive cover twice each season.
Gasoline -- Do not put four-cycle gas in a two-cycle
engine. Lawnmower gas should not be used in the weed-whacker as the fuel is too lean. The
weed-whacker may run for a while on the straight gasoline, but will eventually stop and be
difficult or impossible to restart. Add oil to the fuel to put things right again.
Gasoline -- Do not put two-cycle gas in a four-cycle
engine. Weed-whacker fuel should not be used in the lawn mower as the fuel is too rich.
The lawn mower may run for a while on the gas/oil mix, but will eventually stop and be
difficult or impossible to restart because the oil has fouled the spark plug. Dump the
gas/oil mixture out of the fuel tank, change the spark plug and put fresh, straight
gasoline back into the tank.