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How to Maintain Your Lawn Mower Engine


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Tune-up: Learn how to tune-up your engine. Tuning up is good for your engine and the environment. It will also save you money. Our interactive demo walks you through four easy steps for tuning up your mower. It is even easier with a Briggs & Stratton Maintenance Kit. According to environmental impact data, a properly tuned and maintained lawn mower makes a big difference:

  • Reduces mower emissions by up to 50%
  • Reduces costly fuel consumption up to 30%
  • And, extends the life of your engine!

To keep your mower operating smoothly throughout the lawn care season, remember these maintenance tips:

Oil

  • Check the oil level regularly - ideally every time you mow. Add oil up to the fill line on the dipstick as needed.
  • If you have a new mower, change the oil after the first five hours of use. After that, change the oil after every 50 hours of use or at the beginning of each lawn care season.

Keep the Blades Sharp

  • Keep your mower blades sharpened so that you are cutting your lawn cleanly and not "tearing" the grass. Your lawn mower dealer can do this for you.

Use Clean, Fresh Fuel

  • Clean, fresh fuel is essential for an engine to start quickly and operate efficiently.Gasoline deteriorates after 30 days and can negatively affect engine and starting performance.
  • Briggs & Stratton Fuel Stabilizer Plus gasoline additive can keep your fuel fresh year-round and help prevent gum deposits in the carburetor.
  • Or purchase a Fresh Start® continuous fuel preserver cap and cartridge for up to six months of hassle-free starting.

Cleaning a Clogged Mower Deck

  • When the mower deck is clogged with clippings, turn off the mower, disconnect the spark plug and then use a garden hose to wash away the material.
  • After spraying, remove any remaining clumps of grass that may interfere with the blade by using a stick or other tool - never use your hands or feet.

My craftsman tiller with a B&S engine will only run when the choke is fully closed.

Asked by: jeffs1979
The problems you are having sound like symptoms of a dirty carb, I recommend removing the carb from the unit to clean it. Before removing the carburetor I strongly recommend that you take a few digital pictures of how the springs and linkage are re-connected. Once removed, make sure you clean all the small internal passageways. You will also need to remove the fuel bowl on the base of the unit. Once it is removed make sure you clean the inlet needle and the main jet of the carb (see above pictures). I would also recommend running some Briggs and Stratton fresh start fuel stabilizer (mixed with the recommended ratio of gasoline) through it to clean out whatever you may have missed in the initial cleaning.
Answered by: Nicole_BriggsStratton
Date published: 2014-08-08

My mower engine changes rpms while running. Is this a fuel filter issue. If so, where is it located?

Asked by: Jacklos
This will happen if the carburetor is dirty or if the governor/linkages need to be adjusted. Hold the throttle linkage steady, if the surging stops then the linkage need to be replaced and adjusted. Here is a link to help with that: http://bit.ly/Zudi8b If the surging continues, this is likely a clog in the carburetor. You will want to clean the carburetor or do a complete overhaul.
Answered by: Nicole_BriggsStratton
Date published: 2014-08-08

When I start the mower, it operates in full throttle, no response on the throtlle. I have to shut it down by the safety bar, probably throttle valve stays wide open. PMissing a spring? Looking for detailed picture.

Asked by: heinflhs
It may be an issue with the spring. The linkage diagrams are located in the engines repair manuals only. You will need to work with a local dealer for get this manual.
Answered by: Nicole_BriggsStratton
Date published: 2014-06-26

I lost the manual from my GT 42 B Quattro. Where can I find it? The website does not regognize the Model number.

Asked by: heinflhs
To locate any information on your engine, you will first need the model type and code. Please see the following link for assistance in locating these numbers: http://bit.ly/17rzznN Once you have this information you can find information on your engine here: http://bit.ly/12pIs1I Select engine as your product type and follow the directions for entering the model type and trim into the search fields.
Answered by: Nicole_BriggsStratton
Date published: 2014-06-26

how do I clean the fuel line on my push mower?  It won't start after winterizing

Asked by: tigertail
We recommend changing out the fuel lines and then cleaning out the carburetor. Here is a link that will help with that: http://bit.ly/15ihyvq
Answered by: Nicole_BriggsStratton
Date published: 2014-05-16

How on earth do i add oil to my mower! i know this must sound really dumb there is no dipstick or anything on the mower. 

Asked by: Prad
This will depend on which engine you have. To locate any information on your engine, you will first need the model type and code. Please see the following link for assistance in locating these numbers: http://bit.ly/17rzznN Once you have this information you can find information on your engine here: http://bit.ly/12pIs1I Select engine as your product type and follow the directions for entering the model type and trim into the search fields.
Answered by: Nicole_BriggsStratton
Date published: 2014-05-10

The engine on my mower is running too fast. I've replaced the governor springs but that has no made any difference. 

Asked by: Brookey
Then you need to adjust the governor itself. Here is a link that will help: http://bit.ly/Zudi8b
Answered by: Nicole_BriggsStratton
Date published: 2014-05-08

Briggs & Stratton Quantum 675 series, where is the oil drain plug

Asked by: steelman
There may be a recessed drain plug on the underside of the engine; however, the equipment manufacturer may have covered this when they installed the engine on their mower. If this drain is blocked you can tilt the engine to its side to drain from the oil fill. When tilting the unit, make sure you remove the gas and tilt fuel tank side up.
Answered by: Nicole_BriggsStratton
Date published: 2014-03-28







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