REGION: LANGUAGE:
My Account Briggs & Stratton My Cart (0)

Frequently Asked Questions

To search the Frequently Asked Questions (FAQs), enter your search terms or questions in the box below. Not sure what to search for, browse by category by clicking the Browse tab. If you still need help, you can submit your question by clicking the Ask a Question tab. Our Answer Center will respond to your question within 3 business days.

Search Frequently Asked Questions

Fuel Recommendations

What type of gas is recommended for my engine?
All 4 stroke cycle spark ignited engines

Fuel must meet these requirements:

  • Clean, fresh, unleaded gasoline.

  • A minimum of 87 octane/ 87 AKI (91 RON). High altitude use, see below.

  • Gasoline with up to 10% ethanol (gasohol) or up to 15% MTBE (methyl tertiary butyl ether), is acceptable.

CAUTION: Do not mix oil in gasoline, or modify engine to run on alternate fuels. This will damage the engine components and void the engine warranty.

To protect the fuel system from gum formation, mix in a fuel stabilizer when adding fuel. See Storage section below

All fuel is not the same. If starting or performance problems occur, change fuel providers or change brands. This engine is certified to operate on gasoline. The emissions control system for this engine is EM (Engine Modifications).

High Altitude
At altitudes over 5,000 feet (1524 meters), a minimum 85 octane / 85 AKI (89 RON) gasoline is acceptable. To remain emissions compliant, high altitude adjustment is required. Operation without this adjustment will cause decreased performance, increased fuel consumption, and increased emissions. See an Authorized Briggs & Stratton Dealer for high altitude adjustment information.

Operation of the engine at altitudes below 2,500 feet (762 meters) with the high altitude kit is not recommended.

All 2 stroke cycle spark ignited engines

Mixing fuel and oil
Always mix a high-quality, 2-cycle oil, such as Briggs & Stratton 2-cycle oil, at 50:1 gasoline to oil ratio.

Fuel must meet these requirements:

  • Clean, fresh, unleaded gasoline.

  • A minimum of 87 octane/87 AKI (91 RON). If operating at high altitude, see below.

  • Gasoline with up to 10% ethanol (gasohol) or up to 15% MTBE (methyl tertiary butyl ether), is acceptable.

CAUTION: Do not use unapproved gasoline such as E85*. Do not modify engine to run on alternate fuels. This will damage the engine components and void the engine warranty.

To protect the fuel system from gum formation, mix in a fuel stabilizer when adding fuel.

See Storage section below.
All fuel is not the same.  If starting or performance problems occur, change fuel providers or change brands.

This engine is certified to operate on gasoline. The emissions control system for this engine is EM (Engine Modifications).

High Altitude use
At altitudes over 5,000 feet (1524 meters), a minimum 85 octane / 85 AKI (89 RON) gasoline is acceptable. To remain emissions compliant, high altitude adjustment is required. Operation without this adjustment will cause decreased performance, increased fuel consumption, and increased emissions. See an Authorized Briggs & Stratton Dealer for high altitude adjustment information.

Operation of the engine at altitudes below 2,500 feet (762 meters) with the high altitude kit is not recommended.

Storage

Fuel will become stale when stored over 30 days. Stale fuel causes acid and gum deposits to form in fuel system or on essential carburetor parts. To keep fuel fresh, use Briggs & Stratton Advanced Formula Fuel Treatment & Stabilizer or fuel stabilizer drip concentrate cartridge.


There is no need to drain gasoline from the engine if a fuel stabilizer is added according to instructions. Run the engine for 2 minutes to circulate the stabilizer throughout the fuel system. The engine and fuel can then be stored up to 24 months.

If gasoline in the engine has not been treated with a fuel stabilizer, it must be drained into an approved container. Run the engine until it stops from lack of fuel. The use of a fuel stabilizer in the storage container is recommended to maintain freshness. It is also recommended that fuel is purchased in quantities that can be used within 30 days. This will assure fuel freshness and volatility tailored to the season.


*NOTE: Briggs & Stratton engines are not designed to run on E85 fuel. E85 is a blend of 85% ethanol (alcohol) and 15% gasoline, which is not compatible with most engines intended to run on regular gasoline. While alcohol is an excellent octane booster, it delivers less power, having an energy value of only about 77,000 Btu per gallon versus 114,000 Btu for regular gasoline. E85 also demands a different fuel-to-air ratio to burn efficiently, requiring specially calibrated carburetors. Further, specially designed fuel system components are required to withstand the high alcohol concentration found in E85.

For additional information on fuel type, please download our Fuel Requirements PDF.



Back to Search Results

Our user community provides a place for users to ask and answer questions of one another. Our staff also participates in this community on a regular basis. Please note that your question may take more than 24 hours to appear. If you are in need of an immediate answer please review our frequently asked questions or contact a local service dealer .

* Indicates a required field.

Please complete the form below to contact us with your question. Provide as much information as possible. We make every effort to personally answer all questions within 3 BUSINESS days. If you are in need of an immediate answer please review our frequently asked questions or contact a local service dealer.

* Indicates a required field.





  • Enter any equipment model numbers you may have


  • Look for STAMPED B&S ENGINE NUMBERS


    STAMPED - YYMMDDxx Identifies Manufacture date


  • 5HP=5, 18-1/2=18.5, 25=25.00


    Series (3 digits) or Torque (ft. lbs)


  • Quantum, Intek, Classic, Sprint, etc.


    Manufacturer of the Tractor, Generator, Lawn mower, etc.


  • What kind of product is the engine coupled to?


    Where was the equipment purchased?


  • When product was purchased. Format: mm/dd/yyyy.

Personal Information












  •  


  • Zip + 4 xxxxx-xxxx Canada use xxx xxx format




  • format: xxx-xxx-xxxx  




  • Would you like to create an account with us?


    Would you like to receive updates and other info from us?




0 Items in Your Cart

Estimated Price: 0.00